diff --git a/src/data/List.js b/src/data/List.js
index 17bebd74b7deb6b3af85a8402155d4c53cb73b17..30087057c8c91b9b20be531cce19e5169bc3a5ff 100644
--- a/src/data/List.js
+++ b/src/data/List.js
@@ -100,7 +100,7 @@ var normalProviderMethods = {
     getItem: function (idx) {
         return this._array[idx];
     },
-    addData: function (newData) {
+    appendData: function (newData) {
         for (var i = 0; i < newData.length; i++) {
             this._array.push(newData[i]);
         }
@@ -126,7 +126,7 @@ var typedArrayProviderMethods = {
         }
         return item;
     },
-    addData: function (newData) {
+    appendData: function (newData) {
         if (!zrUtil.isTypedArray(newData)) {
             if (__DEV__) {
                 throw new Error('Added data must be TypedArray if data in initialization is TypedArray');
@@ -448,7 +448,7 @@ listProto.getProvider = function () {
 listProto.appendData = function (data) {
     var rawData = this._rawData;
     var start = this.count();
-    rawData.addData(data);
+    rawData.appendData(data);
     var end = rawData.count();
     if (!rawData.persistent) {
         end += start;
diff --git a/src/echarts.js b/src/echarts.js
index 359347f2749496102904d8f5d053bf2f73dab64c..5af532ff01533a5356eb2107128ce1e7984092c1 100644
--- a/src/echarts.js
+++ b/src/echarts.js
@@ -1264,8 +1264,12 @@ function triggerUpdatedEvent(silent) {
     !silent && this.trigger('updated');
 }
 
-// ???
-echartsProto.addData = function (params) {
+/**
+ * @param {Object} params
+ * @param {number} params.seriesIndex
+ * @param {Array|TypedArray} params.data
+ */
+echartsProto.appendData = function (params) {
     var seriesIndex = params.seriesIndex;
     var ecModel = this.getModel();
     var seriesModel = ecModel.getSeriesByIndex(seriesIndex);
diff --git a/test/geo-data-stream.html b/test/geo-data-stream.html
index 77be25a8a18b848dcef4ec0911371c52e23fd500..18b049b8f696ddacbdff57d12d94ff8ecc7e758b 100644
--- a/test/geo-data-stream.html
+++ b/test/geo-data-stream.html
@@ -127,7 +127,7 @@
                     function next() {
                         if (chunkCount++ < chunkMax) {
                             var newData = genData(1000);
-                            chart.addData({seriesIndex: 0, data: newData});
+                            chart.appendData({seriesIndex: 0, data: newData});
                             setTimeout(next, 1000);
                         }
                     }
diff --git a/test/node/scatter-gps.js b/test/node/scatter-gps.js
index cc21099633ccd82d09986383dec1d8a711e2007c..479723071b2d37f2f7754d71d67329ab93504cee 100644
--- a/test/node/scatter-gps.js
+++ b/test/node/scatter-gps.js
@@ -87,7 +87,7 @@ function fetchData(idx) {
             data[i+1] = rawData[i] / 1e7;
         }
 
-        chart.addData({
+        chart.appendData({
             seriesIndex: 0,
             data: data
         });
diff --git a/test/scatter-gps.html b/test/scatter-gps.html
index 67542bf805351e7ae233edaa100c85c49163c526..77817b58436706e84b9d2498d99a3c6bbf39dc32 100644
--- a/test/scatter-gps.html
+++ b/test/scatter-gps.html
@@ -62,7 +62,7 @@
                         data[i+1] = rawData[i] / 1e7;
                     }
 
-                    chart.addData({
+                    chart.appendData({
                         seriesIndex: 0,
                         data: data
                     });
diff --git a/test/scatter-random-stream.html b/test/scatter-random-stream.html
index d87a1646ea00a97e7d33450eb8b09ab29a9b8e47..c7a2a6bf38197549599da50233caa9dc9b699e86 100644
--- a/test/scatter-random-stream.html
+++ b/test/scatter-random-stream.html
@@ -179,7 +179,7 @@
                     function next() {
                         if (chunkCount++ < chunkMax) {
                             var newData = genData1(100000, chunkCount);
-                            chart.addData({seriesIndex: 0, data: newData});
+                            chart.appendData({seriesIndex: 0, data: newData});
                             console.log('Data loaded');
                             setTimeout(next, 3000);
                         }