diff --git a/Demo/Scripts/Demo10_LineSimple.cs b/Demo/Scripts/Demo10_LineSimple.cs
index a3171cf2..81c8ecf0 100644
--- a/Demo/Scripts/Demo10_LineSimple.cs
+++ b/Demo/Scripts/Demo10_LineSimple.cs
@@ -30,7 +30,7 @@ public class Demo10_LineSimple : MonoBehaviour
         chart.xAxises[0].boundaryGap = true;
 
         chart.RemoveData();
-        chart.AddSerie("test", SerieType.Line);
+        chart.AddSerie(SerieType.Line);
         for (int i = 0; i < dataCount; i++)
         {
             chart.AddXAxisData("x" + i);
diff --git a/Demo/Scripts/Demo11_AddSinCurve.cs b/Demo/Scripts/Demo11_AddSinCurve.cs
index 8b81ced3..bdc9511a 100644
--- a/Demo/Scripts/Demo11_AddSinCurve.cs
+++ b/Demo/Scripts/Demo11_AddSinCurve.cs
@@ -37,7 +37,7 @@ public class Demo11_AddSinCurve : MonoBehaviour
 
         chart.RemoveData();
 
-        var serie = chart.AddSerie("test", SerieType.Line);
+        var serie = chart.AddSerie(SerieType.Line);
         serie.symbol.type = SerieSymbolType.None;
         serie.lineType = LineType.Normal;
         for (angle = 0; angle < 1080; angle++)
diff --git a/Demo/Scripts/Demo_Dynamic.cs b/Demo/Scripts/Demo_Dynamic.cs
index 9831628f..5e1b2ef9 100644
--- a/Demo/Scripts/Demo_Dynamic.cs
+++ b/Demo/Scripts/Demo_Dynamic.cs
@@ -22,7 +22,7 @@ public class Demo_Dynamic : MonoBehaviour
     {
         chart = gameObject.GetComponentInChildren<CoordinateChart>();
         //chart.RemoveData();
-        var serie = chart.AddSerie("data", SerieType.Line);
+        var serie = chart.AddSerie(SerieType.Line);
         serie.symbol.type = SerieSymbolType.None;
         serie.maxCache = maxCacheDataNumber;
         chart.xAxises[0].maxCache = maxCacheDataNumber;
diff --git a/Scripts/UI/BarChart.cs b/Scripts/UI/BarChart.cs
index b88c1b38..021ee454 100644
--- a/Scripts/UI/BarChart.cs
+++ b/Scripts/UI/BarChart.cs
@@ -18,7 +18,7 @@ namespace XCharts
             m_Title.text = "BarChart";
             m_Tooltip.type = Tooltip.Type.Shadow;
             RemoveData();
-            AddSerie("serie1", SerieType.Bar);
+            AddSerie(SerieType.Bar, "serie1");
             for (int i = 0; i < 5; i++)
             {
                 AddXAxisData("x" + (i + 1));
diff --git a/Scripts/UI/Component/Series.cs b/Scripts/UI/Component/Series.cs
index 02cafda6..93f96903 100644
--- a/Scripts/UI/Component/Series.cs
+++ b/Scripts/UI/Component/Series.cs
@@ -212,7 +212,7 @@ namespace XCharts
         /// <param name="type"></param>
         /// <param name="show"></param>
         /// <returns></returns>
-        public Serie AddSerie(string serieName, SerieType type, bool show = true)
+        public Serie AddSerie(SerieType type, string serieName, bool show = true)
         {
             var serie = GetSerie(serieName);
             if (serie == null)
@@ -254,7 +254,6 @@ namespace XCharts
         /// <param name="serieName"></param>
         /// <param name="value"></param>
         /// <param name="dataName"></param>
-        /// <param name="maxDataNumber"></param>
         /// <returns></returns>
         public bool AddData(string serieName, float value, string dataName = null)
         {
@@ -273,7 +272,6 @@ namespace XCharts
         /// <param name="index"></param>
         /// <param name="value"></param>
         /// <param name="dataName"></param>
-        /// <param name="maxDataNumber"></param>
         /// <returns></returns>
         public bool AddData(int index, float value, string dataName = null)
         {
@@ -292,7 +290,6 @@ namespace XCharts
         /// <param name="serieName"></param>
         /// <param name="multidimensionalData"></param>
         /// <param name="dataName"></param>
-        /// <param name="maxDataNumber"></param>
         /// <returns></returns>
         public bool AddData(string serieName, List<float> multidimensionalData, string dataName = null)
         {
@@ -311,7 +308,6 @@ namespace XCharts
         /// <param name="serieIndex"></param>
         /// <param name="multidimensionalData"></param>
         /// <param name="dataName"></param>
-        /// <param name="maxDataNumber"></param>
         /// <returns></returns>
         public bool AddData(int serieIndex, List<float> multidimensionalData, string dataName = null)
         {
@@ -331,7 +327,6 @@ namespace XCharts
         /// <param name="xValue"></param>
         /// <param name="yValue"></param>
         /// <param name="dataName"></param>
-        /// <param name="maxDataNumber"></param>
         /// <returns></returns>
         public bool AddXYData(string serieName, float xValue, float yValue, string dataName = null)
         {
@@ -351,7 +346,6 @@ namespace XCharts
         /// <param name="xValue"></param>
         /// <param name="yValue"></param>
         /// <param name="dataName"></param>
-        /// <param name="maxDataNumber"></param>
         /// <returns></returns>
         public bool AddXYData(int index, float xValue, float yValue, string dataName = null)
         {
@@ -370,16 +364,22 @@ namespace XCharts
         /// <param name="name"></param>
         /// <param name="value"></param>
         /// <param name="dataIndex"></param>
-        public void UpdateData(string name, float value, int dataIndex = 0)
+        public void UpdateData(string serieName, int dataIndex, float value)
         {
-            var serie = GetSerie(name);
+            var serie = GetSerie(serieName);
             if (serie != null)
             {
                 serie.UpdateYData(dataIndex, value);
             }
         }
 
-        public void UpdateDataName(string serieName, string dataName, int dataIndex = 0)
+        /// <summary>
+        /// 更新指定系列的数据项名称
+        /// </summary>
+        /// <param name="serieName"></param>
+        /// <param name="dataIndex"></param>
+        /// <param name="dataName"></param>
+        public void UpdateDataName(string serieName, int dataIndex, string dataName)
         {
             var serie = GetSerie(serieName);
             if (serie != null)
@@ -388,7 +388,13 @@ namespace XCharts
             }
         }
 
-        public void UpdateDataName(int serieIndex, string dataName, int dataIndex = 0)
+        /// <summary>
+        /// 更新指定系列的数据项名称
+        /// </summary>
+        /// <param name="serieIndex"></param>
+        /// <param name="dataIndex"></param>
+        /// <param name="dataName"></param>
+        public void UpdateDataName(int serieIndex, int dataIndex, string dataName)
         {
             var serie = GetSerie(serieIndex);
             if (serie != null)
@@ -398,14 +404,14 @@ namespace XCharts
         }
 
         /// <summary>
-        /// 更新指定系列的维度Y数据
+        /// 更新指定系列的维度Y数据项的值
         /// </summary>
-        /// <param name="index"></param>
-        /// <param name="value"></param>
+        /// <param name="serieIndex"></param>
         /// <param name="dataIndex"></param>
-        public void UpdateData(int index, float value, int dataIndex = 0)
+        /// <param name="value"></param>
+        public void UpdateData(int serieIndex, int dataIndex, float value)
         {
-            var serie = GetSerie(index);
+            var serie = GetSerie(serieIndex);
             if (serie != null)
             {
                 serie.UpdateYData(dataIndex, value);
@@ -416,13 +422,13 @@ namespace XCharts
         /// <summary>
         /// 更新指定系列的维度X和维度Y数据
         /// </summary>
-        /// <param name="name"></param>
+        /// <param name="serieName"></param>
+        /// <param name="dataIndex"></param>
         /// <param name="xValue"></param>
         /// <param name="yValue"></param>
-        /// <param name="dataIndex"></param>
-        public void UpdateXYData(string name, float xValue, float yValue, int dataIndex = 0)
+        public void UpdateXYData(string serieName,int dataIndex, float xValue, float yValue)
         {
-            var serie = GetSerie(name);
+            var serie = GetSerie(serieName);
             if (serie != null)
             {
                 serie.UpdateXYData(dataIndex, xValue, yValue);
@@ -432,13 +438,13 @@ namespace XCharts
         /// <summary>
         /// 更新指定系列的维度X和维度Y数据
         /// </summary>
-        /// <param name="index"></param>
+        /// <param name="serieIndex"></param>
+        /// <param name="dataIndex"></param>
         /// <param name="xValue"></param>
         /// <param name="yValue"></param>
-        /// <param name="dataIndex"></param>
-        public void UpdateXYData(int index, float xValue, float yValue, int dataIndex = 0)
+        public void UpdateXYData(int serieIndex, int dataIndex,float xValue, float yValue)
         {
-            var serie = GetSerie(index);
+            var serie = GetSerie(serieIndex);
             if (serie != null)
             {
                 serie.UpdateXYData(dataIndex, xValue, yValue);
diff --git a/Scripts/UI/Internal/BaseChart_API.cs b/Scripts/UI/Internal/BaseChart_API.cs
index 9c3e433b..6a7291af 100644
--- a/Scripts/UI/Internal/BaseChart_API.cs
+++ b/Scripts/UI/Internal/BaseChart_API.cs
@@ -111,9 +111,9 @@ namespace XCharts
         /// <param name="type">the type of serie</param>
         /// <param name="show">whether to show this serie</param>
         /// <returns>the added serie</returns>
-        public virtual Serie AddSerie(string serieName, SerieType type, bool show = true)
+        public virtual Serie AddSerie(SerieType type, string serieName = null, bool show = true)
         {
-            return m_Series.AddSerie(serieName, type);
+            return m_Series.AddSerie(type, serieName);
         }
 
         /// <summary>
@@ -234,11 +234,11 @@ namespace XCharts
         /// 更新指定系列中的指定索引数据。
         /// </summary>
         /// <param name="serieName">the name of serie</param>
-        /// <param name="value">the data will be update</param>
         /// <param name="dataIndex">the index of data</param>
-        public virtual void UpdateData(string serieName, float value, int dataIndex = 0)
+        /// <param name="value">the data will be update</param>
+        public virtual void UpdateData(string serieName,int dataIndex, float value)
         {
-            m_Series.UpdateData(serieName, value, dataIndex);
+            m_Series.UpdateData(serieName,dataIndex, value);
             RefreshChart();
         }
 
@@ -247,11 +247,11 @@ namespace XCharts
         /// 更新指定系列中的指定索引数据。
         /// </summary>
         /// <param name="serieIndex">the index of serie</param>
-        /// <param name="value">the data will be update</param>
         /// <param name="dataIndex">the index of data</param>
-        public virtual void UpdateData(int serieIndex, float value, int dataIndex = 0)
+        /// <param name="value">the data will be update</param>
+        public virtual void UpdateData(int serieIndex,int dataIndex, float value)
         {
-            m_Series.UpdateData(serieIndex, value, dataIndex);
+            m_Series.UpdateData(serieIndex, dataIndex,value);
             RefreshChart();
         }
 
@@ -260,11 +260,11 @@ namespace XCharts
         /// 更新指定系列中的指定索引数据名称。
         /// </summary>
         /// <param name="serieName"></param>
-        /// <param name="dataName"></param>
         /// <param name="dataIndex"></param>
-        public virtual void UpdateDataName(string serieName, string dataName, int dataIndex = 0)
+        /// <param name="dataName"></param>
+        public virtual void UpdateDataName(string serieName,int dataIndex, string dataName)
         {
-            m_Series.UpdateDataName(serieName, dataName, dataIndex);
+            m_Series.UpdateDataName(serieName,dataIndex, dataName);
         }
 
         /// <summary>
@@ -274,9 +274,9 @@ namespace XCharts
         /// <param name="serieIndex"></param>
         /// <param name="dataName"></param>
         /// <param name="dataIndex"></param>
-        public virtual void UpdateDataName(int serieIndex, string dataName, int dataIndex)
+        public virtual void UpdateDataName(int serieIndex, int dataIndex, string dataName)
         {
-            m_Series.UpdateDataName(serieIndex, dataName, dataIndex);
+            m_Series.UpdateDataName(serieIndex, dataIndex,dataName);
         }
 
         /// <summary>
diff --git a/Scripts/UI/LineChart.cs b/Scripts/UI/LineChart.cs
index ee39a986..576cce45 100644
--- a/Scripts/UI/LineChart.cs
+++ b/Scripts/UI/LineChart.cs
@@ -19,7 +19,7 @@ namespace XCharts
             m_Title.text = "LineChart";
             m_Tooltip.type = Tooltip.Type.Line;
             RemoveData();
-            AddSerie("serie1", SerieType.Line);
+            AddSerie(SerieType.Line, "serie1");
             for (int i = 0; i < 5; i++)
             {
                 AddXAxisData("x" + (i + 1));
diff --git a/Scripts/UI/PieChart.cs b/Scripts/UI/PieChart.cs
index cd1822bc..90b2af2d 100644
--- a/Scripts/UI/PieChart.cs
+++ b/Scripts/UI/PieChart.cs
@@ -44,7 +44,7 @@ namespace XCharts
             m_Pie = Pie.defaultPie;
             m_Title.text = "PieChart";
             RemoveData();
-            AddSerie("serie1", SerieType.Pie);
+            AddSerie(SerieType.Pie,"serie1");
             AddData(0, 70, "pie1");
             AddData(0, 20, "pie2");
             AddData(0, 10, "pie3");
diff --git a/Scripts/UI/RadarChart.cs b/Scripts/UI/RadarChart.cs
index 5c89c311..3e497b49 100644
--- a/Scripts/UI/RadarChart.cs
+++ b/Scripts/UI/RadarChart.cs
@@ -75,7 +75,7 @@ namespace XCharts
             RemoveData();
             m_Radars.Add(Radar.defaultRadar);
             m_Title.text = "RadarChart";
-            var serie = AddSerie("serie1", SerieType.Radar);
+            var serie = AddSerie(SerieType.Radar, "serie1");
             serie.symbol.type = SerieSymbolType.EmptyCircle;
             serie.symbol.size = 4;
             serie.symbol.selectedSize = 6;
diff --git a/Scripts/UI/ScatterChart.cs b/Scripts/UI/ScatterChart.cs
index 6d5e35b7..038be1fc 100644
--- a/Scripts/UI/ScatterChart.cs
+++ b/Scripts/UI/ScatterChart.cs
@@ -25,7 +25,7 @@ namespace XCharts
             m_YAxises[1].type = Axis.AxisType.Value;
             m_XAxises[1].boundaryGap = false;
             RemoveData();
-            AddSerie("serie1", SerieType.Scatter);
+            AddSerie(SerieType.Scatter, "serie1");
             for (int i = 0; i < 10; i++)
             {
                 AddData(0, Random.Range(10, 100), Random.Range(10, 100));