diff --git a/trunk/research/players/js/srs.player.js b/trunk/research/players/js/srs.player.js
index d7ad42f41..ac45896b6 100755
--- a/trunk/research/players/js/srs.player.js
+++ b/trunk/research/players/js/srs.player.js
@@ -163,6 +163,12 @@ SrsPlayer.prototype.fluency = function() {
 SrsPlayer.prototype.empty_count = function() {
     return this.__fluency.total_empty_count;
 }
+/**
+ * get all log data.
+ */
+SrsPlayer.prototype.dump_log = function() {
+    return this.callbackObj.ref.__dump_log();
+}
 /**
 * to set the DAR, for example, DAR=16:9 where num=16,den=9.
 * @param num, for example, 16. 
diff --git a/trunk/research/players/srs_player.html b/trunk/research/players/srs_player.html
index cf3a7323d..feff4bf28 100755
--- a/trunk/research/players/srs_player.html
+++ b/trunk/research/players/srs_player.html
@@ -561,6 +561,9 @@
 
         $("#main_modal").on("hide", function(){
             if (srs_player) {
+                // report the log to backend.
+                console.log(srs_player.dump_log());
+
                 srs_player.stop();
                 srs_player = null;
             }
diff --git a/trunk/research/players/srs_player/src/Utility.as b/trunk/research/players/srs_player/src/Utility.as
index 058699ead..f462fded3 100644
--- a/trunk/research/players/srs_player/src/Utility.as
+++ b/trunk/research/players/srs_player/src/Utility.as
@@ -8,6 +8,11 @@ package
      */
     public class Utility
     {
+        /**
+         * total log.
+         */
+        public static var logData:String = "";
+
         /**
          * initialize the player by flashvars for config.
          * @param flashvars the config.
@@ -23,6 +28,8 @@ package
         public static function log(js_id:String, msg:String):void {
             msg = "[" + new Date() +"][srs-player][" + js_id + "] " + msg;
 
+            logData += msg + "\n";
+
             trace(msg);
 
             if (!flash.external.ExternalInterface.available) {
diff --git a/trunk/research/players/srs_player/src/srs_player.as b/trunk/research/players/srs_player/src/srs_player.as
index 810335fb8..a0168e65d 100755
--- a/trunk/research/players/srs_player/src/srs_player.as
+++ b/trunk/research/players/srs_player/src/srs_player.as
@@ -131,6 +131,7 @@ package
             flash.external.ExternalInterface.addCallback("__set_fs", this.js_call_set_fs_size);
             flash.external.ExternalInterface.addCallback("__set_bt", this.js_call_set_bt);
             flash.external.ExternalInterface.addCallback("__set_mbt", this.js_call_set_mbt);
+            flash.external.ExternalInterface.addCallback("__dump_log", this.js_call_dump_log);
             
             flash.external.ExternalInterface.call(this.js_on_player_ready, this.js_id);
         }
@@ -273,6 +274,13 @@ package
                 log("user resume play");
             }
         }
+
+        /**
+         * dumps all log data.
+         */
+        private function js_call_dump_log():String {
+            return Utility.logData;
+        }
         
         /**
         * to set the DAR, for example, DAR=16:9 where num=16,den=9.