diff --git a/Assets/YooAsset/Runtime/OperationSystem/AsyncOperationBase.cs b/Assets/YooAsset/Runtime/OperationSystem/AsyncOperationBase.cs
index debf5fa3..513a61ef 100644
--- a/Assets/YooAsset/Runtime/OperationSystem/AsyncOperationBase.cs
+++ b/Assets/YooAsset/Runtime/OperationSystem/AsyncOperationBase.cs
@@ -10,17 +10,22 @@ namespace YooAsset
     {
         private List<AsyncOperationBase> _childs;
         private Action<AsyncOperationBase> _callback;
-        private uint _priority = 0;
+        private uint _priority;
 
         /// <summary>
         /// 等待异步执行完成
         /// </summary>
-        internal bool IsWaitForAsyncComplete { private set; get; } = false;
+        internal bool IsWaitForAsyncComplete { get; private set; }
+
+        /// <summary>
+        /// 标记脏（用于调度器检测并重排）
+        /// </summary>
+        internal bool IsDirty { get; set; }
 
         /// <summary>
         /// 是否已经完成
         /// </summary>
-        internal bool IsFinish { private set; get; } = false;
+        internal bool IsFinish { get; private set; }
 
         /// <summary>
         /// 异步系统是否繁忙
@@ -35,11 +40,6 @@ namespace YooAsset
             }
         }
 
-        /// <summary>
-        /// 标记脏（用于调度器检测并重排）
-        /// </summary>
-        internal bool IsDirty { set; get; } = false;
-
         /// <summary>
         /// 任务优先级
         /// </summary>
@@ -98,6 +98,7 @@ namespace YooAsset
                 {
                     try
                     {
+                        //注意：任务已完成，立即调用回调
                         value.Invoke(this);
                     }
                     catch (Exception ex)
@@ -295,21 +296,25 @@ namespace YooAsset
                 // 结束记录
                 DebugEndRecording();
 
-                try
+                if (_callback != null)
                 {
-                    //TODO 单个回调异常会阻断后续订阅者
-                    _callback?.Invoke(this);
-                }
-                catch (Exception ex)
-                {
-                    YooLogger.Error($"Exception in completion callback: {ex}");
-                }
-                finally
-                {
-                    _callback = null;
-                    if (_taskCompletionSource != null)
-                        _taskCompletionSource.TrySetResult(null);
+                    var invocationList = _callback.GetInvocationList();
+                    foreach (var handler in invocationList)
+                    {
+                        try
+                        {
+                            ((Action<AsyncOperationBase>)handler).Invoke(this);
+                        }
+                        catch (Exception ex)
+                        {
+                            YooLogger.Error($"Exception in completion callback: {ex}");
+                        }
+                    }
                 }
+
+                _callback = null;
+                if (_taskCompletionSource != null)
+                    _taskCompletionSource.TrySetResult(null);
             }
         }
 
@@ -327,7 +332,10 @@ namespace YooAsset
         /// <summary>
         /// 批量执行一定次数的更新逻辑
         /// </summary>
-        /// <param name="count">次数</param>
+        /// <param name="count">最大执行次数，默认1000次</param>
+        /// <remarks>
+        /// 用于需要快速完成但又不想完全阻塞主线程的场景。
+        /// </remarks>
         protected void RunBatchExecution(int count = 1000)
         {
             if (IsDone)
@@ -374,7 +382,7 @@ namespace YooAsset
         /// </summary>
         public void WaitForAsyncComplete()
         {
-            //TODO 防止异步操作被挂起陷入无限死循环！
+            //注意：防止异步操作被挂起陷入无限死循环！
             if (Status == EOperationStatus.None)
             {
                 StartOperation();
@@ -400,15 +408,17 @@ namespace YooAsset
         }
 
         #region 调试信息
+        private const int MaxCycleCheckDepth = 4096; // 循环检测最大深度
+
         /// <summary>
         /// 开始的时间
         /// </summary>
-        public string BeginTime { protected set; get; }
+        public string BeginTime { get; protected set; }
 
         /// <summary>
         /// 处理耗时（单位：毫秒）
         /// </summary>
-        public long ProcessTime { protected set; get; }
+        public long ProcessTime { get; protected set; }
 
         // 加载耗时统计
         private Stopwatch _watch = null;
@@ -449,9 +459,13 @@ namespace YooAsset
             double s = System.Math.Floor(spawnTime - m * 60 - h * 3600);
             return h.ToString("00") + ":" + m.ToString("00") + ":" + s.ToString("00");
         }
+
+        /// <summary>
+        /// 检测添加子任务是否会形成循环依赖
+        /// 使用深度优先搜索（DFS）遍历子任务图
+        /// </summary>
         private bool WouldCreateCycle(AsyncOperationBase child)
         {
-            const int maxVisited = 4096;
             var stack = new Stack<AsyncOperationBase>();
             var visited = new HashSet<AsyncOperationBase>();
             stack.Push(child);
@@ -462,18 +476,22 @@ namespace YooAsset
                 if (node == null)
                     continue;
 
+                // 防止重复访问
                 if (visited.Add(node) == false)
                     continue;
 
-                if (visited.Count > maxVisited)
+                // 防止无限循环（图过大）
+                if (visited.Count > MaxCycleCheckDepth)
                     throw new YooInternalException("Child operation graph is too large, cycle check aborted !");
 
+                // 检测循环：如果遍历到自己，说明形成循环
                 if (ReferenceEquals(node, this))
                     return true;
 
                 if (node._childs == null)
                     continue;
 
+                // 将子节点加入栈
                 for (int i = 0; i < node._childs.Count; i++)
                 {
                     stack.Push(node._childs[i]);
diff --git a/Assets/YooAsset/Runtime/OperationSystem/OperationScheduler.cs b/Assets/YooAsset/Runtime/OperationSystem/OperationScheduler.cs
index a146543f..64b0b398 100644
--- a/Assets/YooAsset/Runtime/OperationSystem/OperationScheduler.cs
+++ b/Assets/YooAsset/Runtime/OperationSystem/OperationScheduler.cs
@@ -10,12 +10,12 @@ namespace YooAsset
     {
         private readonly List<AsyncOperationBase> _operations = new List<AsyncOperationBase>(100);
         private readonly List<AsyncOperationBase> _newList = new List<AsyncOperationBase>(100);
-        private uint _priority = 0;
+        private uint _priority;
 
         /// <summary>
         /// 所属包裹名称
         /// </summary>
-        public string PackageName { private set; get; }
+        public string PackageName { get; private set; }
 
         /// <summary>
         /// 调度器优先级（值越大越优先）
@@ -36,12 +36,12 @@ namespace YooAsset
         /// <summary>
         /// 优先级是否已变更（需要重新排序）
         /// </summary>
-        public bool IsDirty { set; get; } = false;
+        public bool IsDirty { get; set; }
 
         /// <summary>
         /// 创建顺序（用于同优先级稳定排序）
         /// </summary>
-        public int CreateIndex { private set; get; }
+        public int CreateIndex { get; private set; }
 
 
         public OperationScheduler(string packageName, int createIndex)
@@ -53,6 +53,9 @@ namespace YooAsset
         /// <summary>
         /// 开始处理异步操作
         /// </summary>
+        /// <remarks>
+        /// 操作会先添加到临时队列，在下一次Update时才会开始执行
+        /// </remarks>
         public void StartOperation(AsyncOperationBase operation)
         {
             _newList.Add(operation);
diff --git a/Assets/YooAsset/Runtime/OperationSystem/OperationSystem.cs b/Assets/YooAsset/Runtime/OperationSystem/OperationSystem.cs
index e686ea35..8f1139c7 100644
--- a/Assets/YooAsset/Runtime/OperationSystem/OperationSystem.cs
+++ b/Assets/YooAsset/Runtime/OperationSystem/OperationSystem.cs
@@ -15,13 +15,13 @@ namespace YooAsset
         }
 #endif
 
-        // 全局调度器名称
-        public const string GLOBAL_SCHEDULER_NAME = "YOOASSET_GLOBAL_SCHEDULER";
+        public const string GlobalSchedulerName = "YOOASSET_GLOBAL_SCHEDULER"; // 全局调度器名称
+        private const long MinTimeSlice = 10; // 最小时间片（毫秒）
 
         private static readonly Dictionary<string, OperationScheduler> _schedulerDic = new Dictionary<string, OperationScheduler>(100);
         private static readonly List<OperationScheduler> _schedulerList = new List<OperationScheduler>(100);
-        private static bool _isInitialize = false;
-        private static int _createIndex = 0;
+        private static bool _isInitialized;
+        private static int _createIndex;
 
         // 计时器相关
         private static Stopwatch _watch;
@@ -33,12 +33,16 @@ namespace YooAsset
         /// </summary>
         public static long MaxTimeSlice
         {
+            get
+            {
+                return _maxTimeSlice;
+            }
             set
             {
-                if (value < 10)
+                if (value < MinTimeSlice)
                 {
-                    _maxTimeSlice = 10;
-                    YooLogger.Warning($"MaxTimeSlice minimum value is 10 milliseconds.");
+                    _maxTimeSlice = MinTimeSlice;
+                    YooLogger.Warning($"MaxTimeSlice minimum value is {MinTimeSlice} milliseconds.");
                 }
                 else
                 {
@@ -71,14 +75,17 @@ namespace YooAsset
         /// </summary>
         public static void Initialize()
         {
-            if (_isInitialize == false)
+            if (_isInitialized)
             {
-                _isInitialize = true;
-                _watch = Stopwatch.StartNew();
-
-                // 创建全局调度器
-                CreatePackageScheduler(GLOBAL_SCHEDULER_NAME, uint.MaxValue);
+                YooLogger.Warning("Operation system is already initialized!");
+                return;
             }
+
+            _isInitialized = true;
+            _watch = Stopwatch.StartNew();
+
+            // 创建全局调度器
+            CreatePackageScheduler(GlobalSchedulerName, uint.MaxValue);
         }
 
         /// <summary>
@@ -86,7 +93,7 @@ namespace YooAsset
         /// </summary>
         public static void Update()
         {
-            if (_isInitialize == false)
+            if (_isInitialized == false)
                 return;
 
             // 检测是否需要执行排序
@@ -122,8 +129,7 @@ namespace YooAsset
         /// </summary>
         public static void DestroyAll()
         {
-            _isInitialize = false;
-            YooLogger.Log("Operation system destroy all !");
+            _isInitialized = false;
 
             // 清空所有调度器
             foreach (var scheduler in _schedulerList)
@@ -136,7 +142,7 @@ namespace YooAsset
 
             _watch = null;
             _frameTime = 0;
-            MaxTimeSlice = long.MaxValue;
+            _maxTimeSlice = long.MaxValue;
         }
 
         /// <summary>
@@ -144,7 +150,7 @@ namespace YooAsset
         /// </summary>
         public static OperationScheduler CreatePackageScheduler(string packageName, uint priority)
         {
-            DebugCheckInitialize(packageName);
+            DebugEnsureInitialized(packageName);
 
             if (_schedulerDic.ContainsKey(packageName))
             {
@@ -163,10 +169,10 @@ namespace YooAsset
         /// </summary>
         public static void DestroyPackageScheduler(string packageName)
         {
-            DebugCheckInitialize(packageName);
+            DebugEnsureInitialized(packageName);
 
             // 不允许销毁默认调度器
-            if (packageName == GLOBAL_SCHEDULER_NAME)
+            if (packageName == GlobalSchedulerName)
             {
                 throw new YooInternalException("Cannot destroy the global package scheduler!");
             }
@@ -184,7 +190,7 @@ namespace YooAsset
         /// </summary>
         public static void ClearPackageOperation(string packageName)
         {
-            DebugCheckInitialize(packageName);
+            DebugEnsureInitialized(packageName);
 
             var scheduler = GetScheduler(packageName);
             scheduler.ClearAll();
@@ -195,7 +201,7 @@ namespace YooAsset
         /// </summary>
         public static void StartOperation(string packageName, AsyncOperationBase operation)
         {
-            DebugCheckInitialize(packageName);
+            DebugEnsureInitialized(packageName);
 
             var scheduler = GetScheduler(packageName);
             scheduler.StartOperation(operation);
@@ -206,7 +212,7 @@ namespace YooAsset
         /// </summary>
         public static void SetSchedulerPriority(string packageName, uint priority)
         {
-            DebugCheckInitialize(packageName);
+            DebugEnsureInitialized(packageName);
 
             var scheduler = GetScheduler(packageName);
             scheduler.Priority = priority;
@@ -217,7 +223,7 @@ namespace YooAsset
         /// </summary>
         public static uint GetSchedulerPriority(string packageName)
         {
-            DebugCheckInitialize(packageName);
+            DebugEnsureInitialized(packageName);
 
             var scheduler = GetScheduler(packageName);
             return scheduler.Priority;
@@ -240,7 +246,7 @@ namespace YooAsset
         #region 调试信息
         internal static List<DebugOperationInfo> GetDebugOperationInfos(string packageName)
         {
-            DebugCheckInitialize(packageName);
+            DebugEnsureInitialized(packageName);
 
             var scheduler = GetScheduler(packageName);
             return scheduler.GetDebugOperationInfos();
@@ -249,12 +255,12 @@ namespace YooAsset
 
         #region 调试方法
         [Conditional("DEBUG")]
-        private static void DebugCheckInitialize(string packageName)
+        private static void DebugEnsureInitialized(string packageName)
         {
             if (string.IsNullOrWhiteSpace(packageName))
                 throw new YooInternalException("Package name is null or empty.");
 
-            if (_isInitialize == false)
+            if (_isInitialized == false)
                 throw new YooInternalException($"{nameof(OperationSystem)} not initialized !");
         }
         #endregion
diff --git a/Assets/YooAsset/Runtime/ResourcePackage/FileSystemHost.cs b/Assets/YooAsset/Runtime/ResourcePackage/FileSystemHost.cs
index 092512a5..cd0ef411 100644
--- a/Assets/YooAsset/Runtime/ResourcePackage/FileSystemHost.cs
+++ b/Assets/YooAsset/Runtime/ResourcePackage/FileSystemHost.cs
@@ -12,7 +12,7 @@ namespace YooAsset
         /// <summary>
         /// 当前激活的清单
         /// </summary>
-        public PackageManifest ActiveManifest { private set; get; }
+        public PackageManifest ActiveManifest { get; private set; }
 
 
         public FileSystemHost(string packageName)
@@ -75,8 +75,10 @@ namespace YooAsset
 
         /// <summary>
         /// 获取主文件系统
-        ///  说明：文件系统列表里，最后一个属于主文件系统
         /// </summary>
+        /// <remarks>
+        ///  文件系统列表里，最后一个属于主文件系统
+        /// </remarks>
         public IFileSystem GetMainFileSystem()
         {
             int count = FileSystems.Count;
@@ -123,7 +125,7 @@ namespace YooAsset
             if (assetInfo == null || assetInfo.IsInvalid)
                 throw new YooInternalException();
 
-            // 注意：如果清单里未找到资源包会抛出异常！
+            // 注意：如果清单里未找到资源包会抛出异常
             var packageBundle = ActiveManifest.GetMainPackageBundle(assetInfo.Asset);
             return CreateBundleInfo(packageBundle);
         }
@@ -161,6 +163,8 @@ namespace YooAsset
         #endregion
 
         #region 下载器相关
+        private const int DefaultBundleInfoCapacity = 1000;
+
         public bool IsNeedDownloadFromRemoteInternal(AssetInfo assetInfo)
         {
             if (assetInfo.IsInvalid)
@@ -183,6 +187,20 @@ namespace YooAsset
             return false;
         }
 
+        private delegate bool NeedPredicate(IFileSystem fileSystem, PackageBundle bundle);
+        private bool NeedDownload(IFileSystem fileSystem, PackageBundle bundle)
+        {
+            return fileSystem.NeedDownload(bundle);
+        }
+        private bool NeedUnpack(IFileSystem fileSystem, PackageBundle bundle)
+        {
+            return fileSystem.NeedUnpack(bundle);
+        }
+        private bool NeedImport(IFileSystem fileSystem, PackageBundle bundle)
+        {
+            return fileSystem.NeedImport(bundle);
+        }
+
         public ResourceDownloaderOperation CreateResourceDownloader(ResourceDownloaderOptions options)
         {
             return CreateResourceDownloader(ActiveManifest, options);
@@ -191,9 +209,9 @@ namespace YooAsset
         {
             List<BundleInfo> downloadList;
             if (options.Tags == null)
-                downloadList = GetDownloadListByAll(manifest);
+                downloadList = GetBundleListByAll(manifest, NeedDownload);
             else
-                downloadList = GetDownloadListByTags(manifest, options.Tags);
+                downloadList = GetBundleListByTags(manifest, options.Tags, NeedDownload);
 
             var operation = new ResourceDownloaderOperation(PackageName, downloadList, options.MaximumConcurrency, options.FailedTryAgain);
             return operation;
@@ -207,9 +225,9 @@ namespace YooAsset
         {
             List<BundleInfo> downloadList;
             if (options.AssetInfos == null)
-                downloadList = GetDownloadListByAll(manifest);
+                downloadList = GetBundleListByAll(manifest, NeedDownload);
             else
-                downloadList = GetDownloadListByAssetInfos(manifest, options.AssetInfos, options.DownloadBundleDependencies);
+                downloadList = GetBundleListByAssetInfos(manifest, options.AssetInfos, options.DownloadBundleDependencies, NeedDownload);
 
             var operation = new ResourceDownloaderOperation(PackageName, downloadList, options.MaximumConcurrency, options.FailedTryAgain);
             return operation;
@@ -221,13 +239,13 @@ namespace YooAsset
         }
         public ResourceUnpackerOperation CreateResourceUnpacker(PackageManifest manifest, ResourceUnpackerOptions options)
         {
-            List<BundleInfo> unpcakList;
+            List<BundleInfo> unpackList;
             if (options.Tags == null)
-                unpcakList = GetUnpackListByAll(manifest);
+                unpackList = GetBundleListByAll(manifest, NeedUnpack);
             else
-                unpcakList = GetUnpackListByTags(manifest, options.Tags);
+                unpackList = GetBundleListByTags(manifest, options.Tags, NeedUnpack);
 
-            var operation = new ResourceUnpackerOperation(PackageName, unpcakList, options.MaximumConcurrency, options.FailedTryAgain);
+            var operation = new ResourceUnpackerOperation(PackageName, unpackList, options.MaximumConcurrency, options.FailedTryAgain);
             return operation;
         }
 
@@ -237,24 +255,24 @@ namespace YooAsset
         }
         public ResourceImporterOperation CreateResourceImporter(PackageManifest manifest, BundleImporterOptions options)
         {
-            List<BundleInfo> importerList = GetImporterListByBundleInfos(manifest, options.BundleInfos);
+            List<BundleInfo> importerList = GetBundleListByBundleInfos(manifest, options.BundleInfos, NeedImport);
             var operation = new ResourceImporterOperation(PackageName, importerList, options.MaximumConcurrency, options.FailedTryAgain);
             return operation;
         }
 
-        private List<BundleInfo> GetDownloadListByAll(PackageManifest manifest)
+        private List<BundleInfo> GetBundleListByAll(PackageManifest manifest, Func<IFileSystem, PackageBundle, bool> predicate)
         {
             if (manifest == null)
                 return new List<BundleInfo>();
 
-            List<BundleInfo> result = new List<BundleInfo>(1000);
+            List<BundleInfo> result = new List<BundleInfo>(DefaultBundleInfoCapacity);
             foreach (var packageBundle in manifest.BundleList)
             {
                 var fileSystem = GetBelongFileSystem(packageBundle);
                 if (fileSystem == null)
                     continue;
 
-                if (fileSystem.NeedDownload(packageBundle))
+                if (predicate(fileSystem, packageBundle))
                 {
                     var bundleInfo = new BundleInfo(fileSystem, packageBundle);
                     result.Add(bundleInfo);
@@ -262,21 +280,21 @@ namespace YooAsset
             }
             return result;
         }
-        private List<BundleInfo> GetDownloadListByTags(PackageManifest manifest, string[] tags)
+        private List<BundleInfo> GetBundleListByTags(PackageManifest manifest, string[] tags, Func<IFileSystem, PackageBundle, bool> predicate)
         {
             if (manifest == null)
                 return new List<BundleInfo>();
 
-            List<BundleInfo> result = new List<BundleInfo>(1000);
+            List<BundleInfo> result = new List<BundleInfo>(DefaultBundleInfoCapacity);
             foreach (var packageBundle in manifest.BundleList)
             {
                 var fileSystem = GetBelongFileSystem(packageBundle);
                 if (fileSystem == null)
                     continue;
 
-                if (fileSystem.NeedDownload(packageBundle))
+                if (predicate(fileSystem, packageBundle))
                 {
-                    // 如果未带任何标记，则统一下载
+                    // 注意：如果未带任何标记，则统一处理
                     if (packageBundle.HasAnyTags() == false)
                     {
                         var bundleInfo = new BundleInfo(fileSystem, packageBundle);
@@ -284,7 +302,6 @@ namespace YooAsset
                     }
                     else
                     {
-                        // 查询DLC资源
                         if (packageBundle.HasTag(tags))
                         {
                             var bundleInfo = new BundleInfo(fileSystem, packageBundle);
@@ -295,7 +312,7 @@ namespace YooAsset
             }
             return result;
         }
-        private List<BundleInfo> GetDownloadListByAssetInfos(PackageManifest manifest, AssetInfo[] assetInfos, bool recursiveDownload)
+        private List<BundleInfo> GetBundleListByAssetInfos(PackageManifest manifest, AssetInfo[] assetInfos, bool recursiveDepend, Func<IFileSystem, PackageBundle, bool> predicate)
         {
             if (manifest == null)
                 return new List<BundleInfo>();
@@ -331,7 +348,7 @@ namespace YooAsset
                 }
 
                 // 下载主资源包内所有资源对象依赖的资源包
-                if (recursiveDownload)
+                if (recursiveDepend)
                 {
                     foreach (var otherMainAsset in mainBundle.IncludeMainAssets)
                     {
@@ -355,14 +372,14 @@ namespace YooAsset
                 }
             }
 
-            List<BundleInfo> result = new List<BundleInfo>(1000);
+            List<BundleInfo> result = new List<BundleInfo>(DefaultBundleInfoCapacity);
             foreach (var packageBundle in checkList)
             {
                 var fileSystem = GetBelongFileSystem(packageBundle);
                 if (fileSystem == null)
                     continue;
 
-                if (fileSystem.NeedDownload(packageBundle))
+                if (predicate(fileSystem, packageBundle))
                 {
                     var bundleInfo = new BundleInfo(fileSystem, packageBundle);
                     result.Add(bundleInfo);
@@ -370,62 +387,19 @@ namespace YooAsset
             }
             return result;
         }
-        private List<BundleInfo> GetUnpackListByAll(PackageManifest manifest)
+        private List<BundleInfo> GetBundleListByBundleInfos(PackageManifest manifest, ImportBundleInfo[] fileInfos, Func<IFileSystem, PackageBundle, bool> predicate)
         {
             if (manifest == null)
                 return new List<BundleInfo>();
 
-            List<BundleInfo> result = new List<BundleInfo>(1000);
-            foreach (var packageBundle in manifest.BundleList)
-            {
-                var fileSystem = GetBelongFileSystem(packageBundle);
-                if (fileSystem == null)
-                    continue;
-
-                if (fileSystem.NeedUnpack(packageBundle))
-                {
-                    var bundleInfo = new BundleInfo(fileSystem, packageBundle);
-                    result.Add(bundleInfo);
-                }
-            }
-            return result;
-        }
-        private List<BundleInfo> GetUnpackListByTags(PackageManifest manifest, string[] tags)
-        {
-            if (manifest == null)
-                return new List<BundleInfo>();
-
-            List<BundleInfo> result = new List<BundleInfo>(1000);
-            foreach (var packageBundle in manifest.BundleList)
-            {
-                var fileSystem = GetBelongFileSystem(packageBundle);
-                if (fileSystem == null)
-                    continue;
-
-                if (fileSystem.NeedUnpack(packageBundle))
-                {
-                    if (packageBundle.HasTag(tags))
-                    {
-                        var bundleInfo = new BundleInfo(fileSystem, packageBundle);
-                        result.Add(bundleInfo);
-                    }
-                }
-            }
-            return result;
-        }
-        private List<BundleInfo> GetImporterListByBundleInfos(PackageManifest manifest, ImportBundleInfo[] fileInfos)
-        {
-            if (manifest == null)
-                return new List<BundleInfo>();
-
-            List<BundleInfo> result = new List<BundleInfo>();
+            List<BundleInfo> result = new List<BundleInfo>(DefaultBundleInfoCapacity);
             foreach (var fileInfo in fileInfos)
             {
                 string filePath = fileInfo.FilePath;
                 if (string.IsNullOrEmpty(filePath))
                     continue;
 
-                PackageBundle packageBundle = null;
+                PackageBundle packageBundle;
                 if (string.IsNullOrEmpty(fileInfo.BundleName) == false)
                 {
                     if (manifest.TryGetPackageBundleByBundleName(fileInfo.BundleName, out packageBundle) == false)
@@ -458,7 +432,7 @@ namespace YooAsset
                     if (fileSystem == null)
                         continue;
 
-                    if (fileSystem.NeedImport(packageBundle))
+                    if (predicate(fileSystem, packageBundle))
                     {
                         var bundleInfo = new BundleInfo(fileSystem, packageBundle, filePath);
                         result.Add(bundleInfo);
diff --git a/Assets/YooAsset/Runtime/ResourcePackage/Operation/InitializePackageOperation.cs b/Assets/YooAsset/Runtime/ResourcePackage/Operation/InitializePackageOperation.cs
index f9df2e30..ebae1fd1 100644
--- a/Assets/YooAsset/Runtime/ResourcePackage/Operation/InitializePackageOperation.cs
+++ b/Assets/YooAsset/Runtime/ResourcePackage/Operation/InitializePackageOperation.cs
@@ -51,7 +51,6 @@ namespace YooAsset
                 else
                     throw new NotImplementedException($"{_options.GetType().Name}");
 
-                _package._playMode = _playMode;
                 _steps = ESteps.CheckOptions;
             }
 
@@ -122,8 +121,7 @@ namespace YooAsset
                 resourceManager.Initialize(_options, fileSystemHost);
 
                 _fileSystemHost = fileSystemHost;
-                _package._fileSystemHost = fileSystemHost;
-                _package._resourceManager = resourceManager;
+                _package.InternalInitialize(resourceManager, fileSystemHost);
                 _steps = ESteps.InitFileSystem;
             }
 
diff --git a/Assets/YooAsset/Runtime/ResourcePackage/ResourcePackage.cs b/Assets/YooAsset/Runtime/ResourcePackage/ResourcePackage.cs
index b2a75907..93442326 100644
--- a/Assets/YooAsset/Runtime/ResourcePackage/ResourcePackage.cs
+++ b/Assets/YooAsset/Runtime/ResourcePackage/ResourcePackage.cs
@@ -9,9 +9,8 @@ namespace YooAsset
     public class ResourcePackage
     {
         private InitializePackageOperation _initializeOp;
-        internal ResourceManager _resourceManager;
-        internal FileSystemHost _fileSystemHost;
-        internal EPlayMode _playMode;
+        private ResourceManager _resourceManager;
+        private FileSystemHost _fileSystemHost;
 
         /// <summary>
         /// 包裹名
@@ -53,15 +52,16 @@ namespace YooAsset
             set { OperationSystem.SetSchedulerPriority(PackageName, value); }
         }
 
-
+        
         internal ResourcePackage(string packageName)
         {
             PackageName = packageName;
         }
-
-        /// <summary>
-        /// 销毁资源包裹
-        /// </summary>
+        internal void InternalInitialize(ResourceManager manager, FileSystemHost host)
+        {
+            _resourceManager = manager;
+            _fileSystemHost = host;
+        }
         internal void InternalDestroy()
         {
             _initializeOp = null;
@@ -91,7 +91,7 @@ namespace YooAsset
 
             // 检测重复初始化
             if (_initializeOp != null)
-                throw new YooPackageException(PackageName, $"Package '{PackageName}' is already initialized !");
+                throw new YooPackageException(PackageName, $"Resource package '{PackageName}' is already initialized!");
 
             // 开始初始化操作
             _initializeOp = new InitializePackageOperation(this, options);
@@ -113,7 +113,7 @@ namespace YooAsset
         {
             var options = new UnloadAllAssetsOptions(true, true);
             var operation = new DestroyPackageOperation(this, options);
-            OperationSystem.StartOperation(OperationSystem.GLOBAL_SCHEDULER_NAME, operation);
+            OperationSystem.StartOperation(OperationSystem.GlobalSchedulerName, operation);
             return operation;
         }
 
@@ -123,7 +123,8 @@ namespace YooAsset
         /// </summary>
         public RequestPackageVersionOperation RequestPackageVersionAsync()
         {
-            var options = new RequestPackageVersionOptions(true, 60);
+            int defaultTimeout = 60;
+            var options = new RequestPackageVersionOptions(true, defaultTimeout);
             return RequestPackageVersionAsync(options);
         }
 
@@ -132,7 +133,7 @@ namespace YooAsset
         /// </summary>
         public RequestPackageVersionOperation RequestPackageVersionAsync(RequestPackageVersionOptions options)
         {
-            DebugCheckInitialize(false);
+            EnsureInitialized(false);
             var operation = new RequestPackageVersionOperation(_fileSystemHost, options);
             OperationSystem.StartOperation(PackageName, operation);
             return operation;
@@ -143,12 +144,12 @@ namespace YooAsset
         /// </summary>
         public LoadPackageManifestOperation LoadPackageManifestAsync(LoadPackageManifestOptions options)
         {
-            DebugCheckInitialize(false);
+            EnsureInitialized(false);
 
             // 注意：强烈建议在更新之前保持加载器为空！
             if (_resourceManager.HasAnyLoader())
             {
-                YooLogger.Warning($"Found loaded bundle before update manifest ! Recommended to call the  {nameof(UnloadAllAssetsAsync)} method to release loaded bundle !");
+                YooLogger.Warning($"Found loaded bundle before update manifest ! Recommended to call the {nameof(UnloadAllAssetsAsync)} method to release loaded bundle !");
             }
 
             var operation = new LoadPackageManifestOperation(_fileSystemHost, options);
@@ -161,7 +162,7 @@ namespace YooAsset
         /// </summary>
         public PreDownloadContentOperation PreDownloadContentAsync(PreDownloadContentOptions options)
         {
-            DebugCheckInitialize(false);
+            EnsureInitialized(false);
             var operation = new PreDownloadContentOperation(_fileSystemHost, options);
             OperationSystem.StartOperation(PackageName, operation);
             return operation;
@@ -172,7 +173,7 @@ namespace YooAsset
         /// </summary>
         public ClearCacheFilesOperation ClearCacheFilesAsync(ClearCacheFilesOptions options)
         {
-            DebugCheckInitialize(false);
+            EnsureInitialized(false);
             options.Manifest = _fileSystemHost.ActiveManifest;
             var operation = new ClearCacheFilesOperation(_fileSystemHost, options);
             OperationSystem.StartOperation(PackageName, operation);
@@ -186,7 +187,7 @@ namespace YooAsset
         /// </summary>
         public string GetPackageVersion()
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return _fileSystemHost.ActiveManifest.PackageVersion;
         }
 
@@ -195,7 +196,7 @@ namespace YooAsset
         /// </summary>
         public string GetPackageNote()
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return _fileSystemHost.ActiveManifest.PackageNote;
         }
 
@@ -204,7 +205,7 @@ namespace YooAsset
         /// </summary>
         public PackageDetails GetPackageDetails()
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return _fileSystemHost.ActiveManifest.GetPackageDetails();
         }
         #endregion
@@ -225,7 +226,7 @@ namespace YooAsset
         /// <param name="options">卸载选项</param>
         public UnloadAllAssetsOperation UnloadAllAssetsAsync(UnloadAllAssetsOptions options)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             var operation = new UnloadAllAssetsOperation(_resourceManager, options);
             OperationSystem.StartOperation(PackageName, operation);
             return operation;
@@ -238,7 +239,8 @@ namespace YooAsset
         /// </summary>
         public UnloadUnusedAssetsOperation UnloadUnusedAssetsAsync()
         {
-            var options = new UnloadUnusedAssetsOptions(10);
+            int defaultLoopCount = 10;
+            var options = new UnloadUnusedAssetsOptions(defaultLoopCount);
             return UnloadUnusedAssetsAsync(options);
         }
 
@@ -248,7 +250,7 @@ namespace YooAsset
         /// </summary>
         public UnloadUnusedAssetsOperation UnloadUnusedAssetsAsync(UnloadUnusedAssetsOptions options)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             var operation = new UnloadUnusedAssetsOperation(_resourceManager, options);
             OperationSystem.StartOperation(PackageName, operation);
             return operation;
@@ -260,7 +262,7 @@ namespace YooAsset
         /// </summary>
         public void TryUnloadUnusedAsset(string location, int loopCount = 10)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, null);
             _resourceManager.TryUnloadUnusedAsset(assetInfo, loopCount);
         }
@@ -271,7 +273,7 @@ namespace YooAsset
         /// </summary>
         public void TryUnloadUnusedAsset(AssetInfo assetInfo, int loopCount = 10)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             _resourceManager.TryUnloadUnusedAsset(assetInfo, loopCount);
         }
         #endregion
@@ -283,7 +285,7 @@ namespace YooAsset
         /// <param name="location">资源的定位地址</param>
         public bool IsNeedDownloadFromRemote(string location)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, null);
             return _fileSystemHost.IsNeedDownloadFromRemoteInternal(assetInfo);
         }
@@ -294,7 +296,7 @@ namespace YooAsset
         /// <param name="location">资源的定位地址</param>
         public bool IsNeedDownloadFromRemote(AssetInfo assetInfo)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return _fileSystemHost.IsNeedDownloadFromRemoteInternal(assetInfo);
         }
 
@@ -303,7 +305,7 @@ namespace YooAsset
         /// </summary>
         public AssetInfo[] GetAllAssetInfos()
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return _fileSystemHost.ActiveManifest.GetAllAssetInfos();
         }
 
@@ -313,7 +315,7 @@ namespace YooAsset
         /// <param name="tag">资源标签</param>
         public AssetInfo[] GetAssetInfos(string tag)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             string[] tags = new string[] { tag };
             return _fileSystemHost.ActiveManifest.GetAssetInfosByTags(tags);
         }
@@ -324,7 +326,7 @@ namespace YooAsset
         /// <param name="tags">资源标签列表</param>
         public AssetInfo[] GetAssetInfos(string[] tags)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return _fileSystemHost.ActiveManifest.GetAssetInfosByTags(tags);
         }
 
@@ -334,7 +336,7 @@ namespace YooAsset
         /// <param name="location">资源的定位地址</param>
         public AssetInfo GetAssetInfo(string location)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return ConvertLocationToAssetInfo(location, null);
         }
 
@@ -345,7 +347,7 @@ namespace YooAsset
         /// <param name="type">资源类型</param>
         public AssetInfo GetAssetInfo(string location, System.Type type)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return ConvertLocationToAssetInfo(location, type);
         }
 
@@ -355,7 +357,7 @@ namespace YooAsset
         /// <param name="assetGUID">资源GUID</param>
         public AssetInfo GetAssetInfoByGUID(string assetGUID)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return ConvertAssetGUIDToAssetInfo(assetGUID, null);
         }
 
@@ -366,7 +368,7 @@ namespace YooAsset
         /// <param name="type">资源类型</param>
         public AssetInfo GetAssetInfoByGUID(string assetGUID, System.Type type)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return ConvertAssetGUIDToAssetInfo(assetGUID, type);
         }
 
@@ -376,7 +378,7 @@ namespace YooAsset
         /// <param name="location">资源的定位地址</param>
         public bool CheckLocationValid(string location)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             string assetPath = _fileSystemHost.ActiveManifest.TryMappingToAssetPath(location);
             return string.IsNullOrEmpty(assetPath) == false;
         }
@@ -389,7 +391,7 @@ namespace YooAsset
         /// <param name="assetInfo">资源信息</param>
         public RawFileHandle LoadRawFileSync(AssetInfo assetInfo)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return LoadRawFileInternal(assetInfo, true, 0);
         }
 
@@ -399,7 +401,7 @@ namespace YooAsset
         /// <param name="location">资源的定位地址</param>
         public RawFileHandle LoadRawFileSync(string location)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, null);
             return LoadRawFileInternal(assetInfo, true, 0);
         }
@@ -411,7 +413,7 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public RawFileHandle LoadRawFileAsync(AssetInfo assetInfo, uint priority = 0)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return LoadRawFileInternal(assetInfo, false, priority);
         }
 
@@ -422,7 +424,7 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public RawFileHandle LoadRawFileAsync(string location, uint priority = 0)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, null);
             return LoadRawFileInternal(assetInfo, false, priority);
         }
@@ -447,7 +449,7 @@ namespace YooAsset
         /// <param name="physicsMode">场景物理模式</param>
         public SceneHandle LoadSceneSync(string location, LoadSceneMode sceneMode = LoadSceneMode.Single, LocalPhysicsMode physicsMode = LocalPhysicsMode.None)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, null);
             return LoadSceneInternal(assetInfo, true, sceneMode, physicsMode, false, 0);
         }
@@ -460,7 +462,7 @@ namespace YooAsset
         /// <param name="physicsMode">场景物理模式</param>
         public SceneHandle LoadSceneSync(AssetInfo assetInfo, LoadSceneMode sceneMode = LoadSceneMode.Single, LocalPhysicsMode physicsMode = LocalPhysicsMode.None)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return LoadSceneInternal(assetInfo, true, sceneMode, physicsMode, false, 0);
         }
 
@@ -474,7 +476,7 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public SceneHandle LoadSceneAsync(string location, LoadSceneMode sceneMode = LoadSceneMode.Single, LocalPhysicsMode physicsMode = LocalPhysicsMode.None, bool suspendLoad = false, uint priority = 0)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, null);
             return LoadSceneInternal(assetInfo, false, sceneMode, physicsMode, suspendLoad, priority);
         }
@@ -489,13 +491,13 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public SceneHandle LoadSceneAsync(AssetInfo assetInfo, LoadSceneMode sceneMode = LoadSceneMode.Single, LocalPhysicsMode physicsMode = LocalPhysicsMode.None, bool suspendLoad = false, uint priority = 0)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return LoadSceneInternal(assetInfo, false, sceneMode, physicsMode, suspendLoad, priority);
         }
 
         private SceneHandle LoadSceneInternal(AssetInfo assetInfo, bool waitForAsyncComplete, LoadSceneMode sceneMode, LocalPhysicsMode physicsMode, bool suspendLoad, uint priority)
         {
-            DebugCheckAssetLoadType(assetInfo.AssetType);
+            DebugEnsureAssetType(assetInfo.AssetType);
             assetInfo.LoadMethod = AssetInfo.ELoadMethod.LoadScene;
             var loadSceneParams = new LoadSceneParameters(sceneMode, physicsMode);
             var handle = _resourceManager.LoadSceneAsync(assetInfo, loadSceneParams, suspendLoad, priority);
@@ -505,14 +507,14 @@ namespace YooAsset
         }
         #endregion
 
-        #region 资源加载
+        #region 资源加载 [主资源]
         /// <summary>
         /// 同步加载资源对象
         /// </summary>
         /// <param name="assetInfo">资源信息</param>
         public AssetHandle LoadAssetSync(AssetInfo assetInfo)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return LoadAssetInternal(assetInfo, true, 0);
         }
 
@@ -523,7 +525,7 @@ namespace YooAsset
         /// <param name="location">资源的定位地址</param>
         public AssetHandle LoadAssetSync<TObject>(string location) where TObject : UnityEngine.Object
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, typeof(TObject));
             return LoadAssetInternal(assetInfo, true, 0);
         }
@@ -535,7 +537,7 @@ namespace YooAsset
         /// <param name="type">资源类型</param>
         public AssetHandle LoadAssetSync(string location, System.Type type)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, type);
             return LoadAssetInternal(assetInfo, true, 0);
         }
@@ -546,9 +548,8 @@ namespace YooAsset
         /// <param name="location">资源的定位地址</param>
         public AssetHandle LoadAssetSync(string location)
         {
-            DebugCheckInitialize();
-            Type type = typeof(UnityEngine.Object);
-            AssetInfo assetInfo = ConvertLocationToAssetInfo(location, type);
+            EnsureInitialized();
+            AssetInfo assetInfo = ConvertLocationToAssetInfo(location, typeof(UnityEngine.Object));
             return LoadAssetInternal(assetInfo, true, 0);
         }
 
@@ -560,7 +561,7 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public AssetHandle LoadAssetAsync(AssetInfo assetInfo, uint priority = 0)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return LoadAssetInternal(assetInfo, false, priority);
         }
 
@@ -572,7 +573,7 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public AssetHandle LoadAssetAsync<TObject>(string location, uint priority = 0) where TObject : UnityEngine.Object
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, typeof(TObject));
             return LoadAssetInternal(assetInfo, false, priority);
         }
@@ -585,7 +586,7 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public AssetHandle LoadAssetAsync(string location, System.Type type, uint priority = 0)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, type);
             return LoadAssetInternal(assetInfo, false, priority);
         }
@@ -597,16 +598,15 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public AssetHandle LoadAssetAsync(string location, uint priority = 0)
         {
-            DebugCheckInitialize();
-            Type type = typeof(UnityEngine.Object);
-            AssetInfo assetInfo = ConvertLocationToAssetInfo(location, type);
+            EnsureInitialized();
+            AssetInfo assetInfo = ConvertLocationToAssetInfo(location, typeof(UnityEngine.Object));
             return LoadAssetInternal(assetInfo, false, priority);
         }
 
 
         private AssetHandle LoadAssetInternal(AssetInfo assetInfo, bool waitForAsyncComplete, uint priority)
         {
-            DebugCheckAssetLoadType(assetInfo.AssetType);
+            DebugEnsureAssetType(assetInfo.AssetType);
             assetInfo.LoadMethod = AssetInfo.ELoadMethod.LoadAsset;
             var handle = _resourceManager.LoadAssetAsync(assetInfo, priority);
             if (waitForAsyncComplete)
@@ -615,14 +615,14 @@ namespace YooAsset
         }
         #endregion
 
-        #region 资源加载
+        #region 资源加载 [子资源]
         /// <summary>
         /// 同步加载子资源对象
         /// </summary>
         /// <param name="assetInfo">资源信息</param>
         public SubAssetsHandle LoadSubAssetsSync(AssetInfo assetInfo)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return LoadSubAssetsInternal(assetInfo, true, 0);
         }
 
@@ -633,7 +633,7 @@ namespace YooAsset
         /// <param name="location">资源的定位地址</param>
         public SubAssetsHandle LoadSubAssetsSync<TObject>(string location) where TObject : UnityEngine.Object
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, typeof(TObject));
             return LoadSubAssetsInternal(assetInfo, true, 0);
         }
@@ -645,7 +645,7 @@ namespace YooAsset
         /// <param name="type">子对象类型</param>
         public SubAssetsHandle LoadSubAssetsSync(string location, System.Type type)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, type);
             return LoadSubAssetsInternal(assetInfo, true, 0);
         }
@@ -656,9 +656,8 @@ namespace YooAsset
         /// <param name="location">资源的定位地址</param>
         public SubAssetsHandle LoadSubAssetsSync(string location)
         {
-            DebugCheckInitialize();
-            Type type = typeof(UnityEngine.Object);
-            AssetInfo assetInfo = ConvertLocationToAssetInfo(location, type);
+            EnsureInitialized();
+            AssetInfo assetInfo = ConvertLocationToAssetInfo(location, typeof(UnityEngine.Object));
             return LoadSubAssetsInternal(assetInfo, true, 0);
         }
 
@@ -670,7 +669,7 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public SubAssetsHandle LoadSubAssetsAsync(AssetInfo assetInfo, uint priority = 0)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return LoadSubAssetsInternal(assetInfo, false, priority);
         }
 
@@ -682,7 +681,7 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public SubAssetsHandle LoadSubAssetsAsync<TObject>(string location, uint priority = 0) where TObject : UnityEngine.Object
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, typeof(TObject));
             return LoadSubAssetsInternal(assetInfo, false, priority);
         }
@@ -695,7 +694,7 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public SubAssetsHandle LoadSubAssetsAsync(string location, System.Type type, uint priority = 0)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, type);
             return LoadSubAssetsInternal(assetInfo, false, priority);
         }
@@ -707,16 +706,15 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public SubAssetsHandle LoadSubAssetsAsync(string location, uint priority = 0)
         {
-            DebugCheckInitialize();
-            Type type = typeof(UnityEngine.Object);
-            AssetInfo assetInfo = ConvertLocationToAssetInfo(location, type);
+            EnsureInitialized();
+            AssetInfo assetInfo = ConvertLocationToAssetInfo(location, typeof(UnityEngine.Object));
             return LoadSubAssetsInternal(assetInfo, false, priority);
         }
 
 
         private SubAssetsHandle LoadSubAssetsInternal(AssetInfo assetInfo, bool waitForAsyncComplete, uint priority)
         {
-            DebugCheckAssetLoadType(assetInfo.AssetType);
+            DebugEnsureAssetType(assetInfo.AssetType);
             assetInfo.LoadMethod = AssetInfo.ELoadMethod.LoadSubAssets;
             var handle = _resourceManager.LoadSubAssetsAsync(assetInfo, priority);
             if (waitForAsyncComplete)
@@ -725,14 +723,14 @@ namespace YooAsset
         }
         #endregion
 
-        #region 资源加载
+        #region 资源加载 [全部资源]
         /// <summary>
         /// 同步加载资源包内所有资源对象
         /// </summary>
         /// <param name="assetInfo">资源信息</param>
         public AllAssetsHandle LoadAllAssetsSync(AssetInfo assetInfo)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return LoadAllAssetsInternal(assetInfo, true, 0);
         }
 
@@ -743,7 +741,7 @@ namespace YooAsset
         /// <param name="location">资源的定位地址</param>
         public AllAssetsHandle LoadAllAssetsSync<TObject>(string location) where TObject : UnityEngine.Object
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, typeof(TObject));
             return LoadAllAssetsInternal(assetInfo, true, 0);
         }
@@ -755,7 +753,7 @@ namespace YooAsset
         /// <param name="type">子对象类型</param>
         public AllAssetsHandle LoadAllAssetsSync(string location, System.Type type)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, type);
             return LoadAllAssetsInternal(assetInfo, true, 0);
         }
@@ -766,9 +764,8 @@ namespace YooAsset
         /// <param name="location">资源的定位地址</param>
         public AllAssetsHandle LoadAllAssetsSync(string location)
         {
-            DebugCheckInitialize();
-            Type type = typeof(UnityEngine.Object);
-            AssetInfo assetInfo = ConvertLocationToAssetInfo(location, type);
+            EnsureInitialized();
+            AssetInfo assetInfo = ConvertLocationToAssetInfo(location, typeof(UnityEngine.Object));
             return LoadAllAssetsInternal(assetInfo, true, 0);
         }
 
@@ -780,7 +777,7 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public AllAssetsHandle LoadAllAssetsAsync(AssetInfo assetInfo, uint priority = 0)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return LoadAllAssetsInternal(assetInfo, false, priority);
         }
 
@@ -792,7 +789,7 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public AllAssetsHandle LoadAllAssetsAsync<TObject>(string location, uint priority = 0) where TObject : UnityEngine.Object
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, typeof(TObject));
             return LoadAllAssetsInternal(assetInfo, false, priority);
         }
@@ -805,7 +802,7 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public AllAssetsHandle LoadAllAssetsAsync(string location, System.Type type, uint priority = 0)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             AssetInfo assetInfo = ConvertLocationToAssetInfo(location, type);
             return LoadAllAssetsInternal(assetInfo, false, priority);
         }
@@ -817,16 +814,15 @@ namespace YooAsset
         /// <param name="priority">加载的优先级</param>
         public AllAssetsHandle LoadAllAssetsAsync(string location, uint priority = 0)
         {
-            DebugCheckInitialize();
-            Type type = typeof(UnityEngine.Object);
-            AssetInfo assetInfo = ConvertLocationToAssetInfo(location, type);
+            EnsureInitialized();
+            AssetInfo assetInfo = ConvertLocationToAssetInfo(location, typeof(UnityEngine.Object));
             return LoadAllAssetsInternal(assetInfo, false, priority);
         }
 
 
         private AllAssetsHandle LoadAllAssetsInternal(AssetInfo assetInfo, bool waitForAsyncComplete, uint priority)
         {
-            DebugCheckAssetLoadType(assetInfo.AssetType);
+            DebugEnsureAssetType(assetInfo.AssetType);
             assetInfo.LoadMethod = AssetInfo.ELoadMethod.LoadAllAssets;
             var handle = _resourceManager.LoadAllAssetsAsync(assetInfo, priority);
             if (waitForAsyncComplete)
@@ -841,16 +837,16 @@ namespace YooAsset
         /// </summary>
         public ResourceDownloaderOperation CreateResourceDownloader(ResourceDownloaderOptions options)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return _fileSystemHost.CreateResourceDownloader(options);
         }
-        
+
         /// <summary>
         /// 创建资源下载器，用于下载指定的资源信息列表依赖的资源包文件
         /// </summary>
         public ResourceDownloaderOperation CreateResourceDownloader(BundleDownloaderOptions options)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return _fileSystemHost.CreateResourceDownloader(options);
         }
         #endregion
@@ -861,7 +857,7 @@ namespace YooAsset
         /// </summary>
         public ResourceUnpackerOperation CreateResourceUnpacker(ResourceUnpackerOptions options)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return _fileSystemHost.CreateResourceUnpacker(options);
         }
         #endregion
@@ -872,7 +868,7 @@ namespace YooAsset
         /// </summary>
         public ResourceImporterOperation CreateResourceImporter(BundleImporterOptions options)
         {
-            DebugCheckInitialize();
+            EnsureInitialized();
             return _fileSystemHost.CreateResourceImporter(options);
         }
         #endregion
@@ -889,47 +885,43 @@ namespace YooAsset
         #endregion
 
         #region 调试方法
-        private void DebugCheckInitialize(bool checkActiveManifest = true)
+        private void EnsureInitialized(bool checkActiveManifest = true)
         {
             if (InitializeStatus != EOperationStatus.Succeed)
             {
                 if (InitializeStatus == EOperationStatus.None)
                 {
-                    throw new YooPackageException(PackageName, "Package not initialize !");
+                    throw new YooPackageException(PackageName, "Resource package not initialized!");
                 }
                 else if (InitializeStatus == EOperationStatus.Processing)
                 {
-                    throw new YooPackageException(PackageName, "Package initialize not completed !");
+                    throw new YooPackageException(PackageName, "Resource package initialization not completed!");
                 }
                 else if (InitializeStatus == EOperationStatus.Failed)
                 {
                     string error = _initializeOp == null ? string.Empty : _initializeOp.Error;
-                    throw new YooPackageException(PackageName, $"Package initialize failed ! {error}");
+                    throw new YooPackageException(PackageName, $"Resource package initialization failed! Error : {error}");
                 }
             }
 
             if (checkActiveManifest)
             {
                 if (_fileSystemHost.ActiveManifest == null)
-                    throw new YooPackageException(PackageName, "Can not found active package manifest !");
+                    throw new YooPackageException(PackageName, "Cannot found active package manifest!");
             }
         }
 
         [Conditional("DEBUG")]
-        private void DebugCheckAssetLoadType(System.Type type)
+        private void DebugEnsureAssetType(System.Type type)
         {
             if (type == null)
                 return;
 
             if (typeof(UnityEngine.Behaviour).IsAssignableFrom(type))
-            {
-                throw new YooLoadException($"Load asset type is invalid : {type.FullName} !");
-            }
+                throw new YooLoadException($"Load asset type is invalid : {type.FullName}");
 
             if (typeof(UnityEngine.Object).IsAssignableFrom(type) == false)
-            {
-                throw new YooLoadException($"Load asset type is invalid : {type.FullName} !");
-            }
+                throw new YooLoadException($"Load asset type is invalid : {type.FullName}");
         }
         #endregion
 
diff --git a/Assets/YooAsset/Runtime/YooAssets.cs b/Assets/YooAsset/Runtime/YooAssets.cs
index 490af73a..6dc1e3da 100644
--- a/Assets/YooAsset/Runtime/YooAssets.cs
+++ b/Assets/YooAsset/Runtime/YooAssets.cs
@@ -13,21 +13,21 @@ namespace YooAsset
         [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
         private static void OnRuntimeInitialize()
         {
-            _isInitialize = false;
+            _isInitialized = false;
             _packages.Clear();
         }
 #endif
 
-        private static bool _isInitialize = false;
-        private static GameObject _driver = null;
-        private static readonly List<ResourcePackage> _packages = new List<ResourcePackage>();
+        private static bool _isInitialized;
+        private static GameObject _driver;
+        private static readonly Dictionary<string, ResourcePackage> _packages = new Dictionary<string, ResourcePackage>(10);
 
         /// <summary>
         /// 是否已经初始化
         /// </summary>
         public static bool Initialized
         {
-            get { return _isInitialize; }
+            get { return _isInitialized; }
         }
 
         /// <summary>
@@ -36,31 +36,27 @@ namespace YooAsset
         /// <param name="logger">自定义日志处理</param>
         public static void Initialize(ILogger logger = null)
         {
-            if (_isInitialize)
+            if (_isInitialized)
             {
-                UnityEngine.Debug.LogWarning($"{nameof(YooAssets)} is initialized !");
+                YooLogger.Warning("YooAssets is already initialized!");
                 return;
             }
 
-            if (_isInitialize == false)
-            {
-                YooLogger.Logger = logger;
+            YooLogger.Logger = logger;
 
-                // 创建驱动器
-                _isInitialize = true;
-                _driver = new UnityEngine.GameObject($"[{nameof(YooAssets)}]");
-                _driver.AddComponent<YooAssetsDriver>();
-                UnityEngine.Object.DontDestroyOnLoad(_driver);
-                YooLogger.Log($"{nameof(YooAssets)} initialize !");
+            // 创建驱动器
+            _isInitialized = true;
+            _driver = new UnityEngine.GameObject($"[{nameof(YooAssets)}]");
+            _driver.AddComponent<YooAssetsDriver>();
+            UnityEngine.Object.DontDestroyOnLoad(_driver);
 
 #if DEBUG
-                // 添加远程调试脚本
-                _driver.AddComponent<RemoteDebuggerInRuntime>();
+            // 添加远程调试脚本
+            _driver.AddComponent<RemoteDebuggerInRuntime>();
 #endif
 
-                // 初始化异步操作系统
-                OperationSystem.Initialize();
-            }
+            // 初始化异步操作系统
+            OperationSystem.Initialize();
         }
 
         /// <summary>
@@ -68,9 +64,9 @@ namespace YooAsset
         /// </summary>
         public static void Destroy()
         {
-            if (_isInitialize)
+            if (_isInitialized)
             {
-                _isInitialize = false;
+                _isInitialized = false;
 
                 if (_driver != null)
                     GameObject.Destroy(_driver);
@@ -91,35 +87,25 @@ namespace YooAsset
         /// </summary>
         internal static void Update()
         {
-            if (_isInitialize)
+            if (_isInitialized)
             {
                 OperationSystem.Update();
             }
         }
 
-        /// <summary>
-        /// 创建资源包裹
-        /// </summary>
-        /// <param name="packageName">包裹名称</param>
-        public static ResourcePackage CreatePackage(string packageName)
-        {
-            return CreatePackage(packageName, 0);
-        }
-
         /// <summary>
         /// 创建资源包裹
         /// </summary>
         /// <param name="packageName">包裹名称</param>
         /// <param name="packagePriority">包裹优先级（值越大越优先更新）</param>
-        public static ResourcePackage CreatePackage(string packageName, uint packagePriority)
+        public static ResourcePackage CreatePackage(string packageName, uint packagePriority = 0)
         {
-            CheckException(packageName);
+            EnsureInitialized(packageName);
             if (ContainsPackage(packageName))
-                throw new YooPackageException(packageName, $"Package {packageName} already existed ! Cannot create duplicate packages.");
+                throw new YooPackageException(packageName, $"Resource package {packageName} already existed! Cannot create duplicate packages.");
 
-            YooLogger.Log($"Create resource package : {packageName}");
             ResourcePackage package = new ResourcePackage(packageName);
-            _packages.Add(package);
+            _packages.Add(packageName, package);
 
             // 注册包裹调度器
             OperationSystem.CreatePackageScheduler(packageName, packagePriority);
@@ -133,7 +119,7 @@ namespace YooAsset
         /// <param name="packageName">包裹名称</param>
         public static ResourcePackage GetPackage(string packageName)
         {
-            CheckException(packageName);
+            EnsureInitialized(packageName);
             var package = GetPackageInternal(packageName);
             if (package == null)
                 YooLogger.Error($"Can not found resource package : {packageName}");
@@ -146,16 +132,16 @@ namespace YooAsset
         /// <param name="packageName">包裹名称</param>
         public static ResourcePackage TryGetPackage(string packageName)
         {
-            CheckException(packageName);
+            EnsureInitialized(packageName);
             return GetPackageInternal(packageName);
         }
 
         /// <summary>
         /// 获取所有资源包裹
         /// </summary>
-        public static List<ResourcePackage> GetAllPackages()
+        public static IReadOnlyList<ResourcePackage> GetAllPackages()
         {
-            return _packages.ToList();
+            return _packages.Values.ToList();
         }
 
         /// <summary>
@@ -164,35 +150,24 @@ namespace YooAsset
         /// <param name="packageName">包裹名称</param>
         public static bool RemovePackage(string packageName)
         {
-            CheckException(packageName);
+            EnsureInitialized(packageName);
             ResourcePackage package = GetPackageInternal(packageName);
             if (package == null)
+            {
+                YooLogger.Error($"Can not found resource package : {packageName}");
                 return false;
+            }
 
-            return RemovePackage(package);
-        }
-
-        /// <summary>
-        /// 移除资源包裹
-        /// </summary>
-        /// <param name="package">包裹实例对象</param>
-        public static bool RemovePackage(ResourcePackage package)
-        {
-            CheckException(package);
-            string packageName = package.PackageName;
             if (package.InitializeStatus != EOperationStatus.None)
             {
                 YooLogger.Error($"The resource package {packageName} has not been destroyed, please call the method {nameof(ResourcePackage.DestroyPackageAsync)} to destroy!");
                 return false;
             }
 
-            YooLogger.Log($"Remove resource package : {packageName}");
-
             // 先销毁调度器，再移除包裹
             OperationSystem.DestroyPackageScheduler(packageName);
 
-            _packages.Remove(package);
-            return true;
+            return _packages.Remove(packageName);
         }
 
         /// <summary>
@@ -201,35 +176,23 @@ namespace YooAsset
         /// <param name="packageName">包裹名称</param>
         public static bool ContainsPackage(string packageName)
         {
-            CheckException(packageName);
+            EnsureInitialized(packageName);
             var package = GetPackageInternal(packageName);
             return package != null;
         }
 
         private static ResourcePackage GetPackageInternal(string packageName)
         {
-            foreach (var package in _packages)
-            {
-                if (package.PackageName == packageName)
-                    return package;
-            }
-            return null;
+            _packages.TryGetValue(packageName, out var package);
+            return package;
         }
-        private static void CheckException(string packageName)
+        private static void EnsureInitialized(string packageName)
         {
-            if (_isInitialize == false)
-                throw new YooInitializeException($"{nameof(YooAssets)} not initialized ! Please call  {nameof(YooAssets.Initialize)} first.");
+            if (_isInitialized == false)
+                throw new YooInitializeException($"YooAssets not initialized! Please call {nameof(YooAssets.Initialize)} first.");
 
             if (string.IsNullOrEmpty(packageName))
-                throw new YooInitializeException("Package name cannot be null or empty !");
-        }
-        private static void CheckException(ResourcePackage package)
-        {
-            if (_isInitialize == false)
-                throw new YooInitializeException($"{nameof(YooAssets)} not initialized ! Please call  {nameof(YooAssets.Initialize)} first.");
-
-            if (package == null)
-                throw new YooInitializeException("Package instance cannot be null !");
+                throw new YooInitializeException("Package name cannot be null or empty!");
         }
 
         #region 系统参数
@@ -248,9 +211,9 @@ namespace YooAsset
             DebugReport report = new DebugReport();
             report.FrameCount = Time.frameCount;
 
-            foreach (var package in _packages)
+            foreach (var kv in _packages)
             {
-                var packageData = package.GetDebugPackageData();
+                var packageData = kv.Value.GetDebugPackageData();
                 report.PackageDatas.Add(packageData);
             }
             return report;
diff --git a/Assets/YooAsset/Samples~/Extension Sample/Runtime/ExtensionOperation/LoadGameObjectOperation.cs b/Assets/YooAsset/Samples~/Extension Sample/Runtime/ExtensionOperation/LoadGameObjectOperation.cs
index 21bb2ef5..e1984113 100644
--- a/Assets/YooAsset/Samples~/Extension Sample/Runtime/ExtensionOperation/LoadGameObjectOperation.cs	
+++ b/Assets/YooAsset/Samples~/Extension Sample/Runtime/ExtensionOperation/LoadGameObjectOperation.cs	
@@ -9,7 +9,7 @@ public static class YooAssetsExtension
     public static LoadGameObjectOperation LoadGameObjectAsync(this ResourcePackage package, string location, Vector3 position, Quaternion rotation, Transform parent, bool destroyGoOnRelease = false)
     {
         var operation = new LoadGameObjectOperation(package.PackageName, location, position, rotation, parent, destroyGoOnRelease);
-        OperationSystem.StartOperation(OperationSystem.GLOBAL_SCHEDULER_NAME, operation);
+        OperationSystem.StartOperation(OperationSystem.GlobalSchedulerName, operation);
         return operation;
     }
 }
diff --git a/Assets/YooAsset/Samples~/Extension Sample/Runtime/ExtensionOperation/OperationHelper.cs b/Assets/YooAsset/Samples~/Extension Sample/Runtime/ExtensionOperation/OperationHelper.cs
index 36b77b13..d5bacbf2 100644
--- a/Assets/YooAsset/Samples~/Extension Sample/Runtime/ExtensionOperation/OperationHelper.cs	
+++ b/Assets/YooAsset/Samples~/Extension Sample/Runtime/ExtensionOperation/OperationHelper.cs	
@@ -11,6 +11,6 @@ public class OperationHelper
     /// </summary>
     public static void StartOperation(AsyncOperationBase operation)
     {
-        OperationSystem.StartOperation(OperationSystem.GLOBAL_SCHEDULER_NAME, operation);
+        OperationSystem.StartOperation(OperationSystem.GlobalSchedulerName, operation);
     }
 }
\ No newline at end of file