diff --git a/extensions/AssetsManager/AssetsManager.cpp b/extensions/AssetsManager/AssetsManager.cpp
index 8060f86445..04d1fde900 100644
--- a/extensions/AssetsManager/AssetsManager.cpp
+++ b/extensions/AssetsManager/AssetsManager.cpp
@@ -83,6 +83,7 @@ AssetsManager::AssetsManager(const char* packageUrl/* =NULL */, const char* vers
 , _connectionTimeout(0)
 , _delegate(NULL)
 , _isDownloading(false)
+, _shouldDeleteDelegateWhenExit(false)
 {
     checkStoragePath();
     _schedule = new Helper();
@@ -90,14 +91,14 @@ AssetsManager::AssetsManager(const char* packageUrl/* =NULL */, const char* vers
 
 AssetsManager::~AssetsManager()
 {
-    if (_delegate)
-    {
-        _delegate->release();
-    }
     if (_schedule)
     {
         _schedule->release();
     }
+    if (_shouldDeleteDelegateWhenExit)
+    {
+        delete _delegate;
+    }
 }
 
 void AssetsManager::checkStoragePath()
@@ -505,17 +506,7 @@ void AssetsManager::deleteVersion()
 
 void AssetsManager::setDelegate(AssetsManagerDelegateProtocol *delegate)
 {
-    if (_delegate)
-    {
-        _delegate->release();
-    }
-    
     _delegate = delegate;
-    
-    if (_delegate)
-    {
-        _delegate->retain();
-    }
 }
 
 void AssetsManager::setConnectionTimeout(unsigned int timeout)
@@ -661,8 +652,8 @@ AssetsManager* AssetsManager::create(const char* packageUrl, const char* version
 
     auto* manager = new AssetsManager(packageUrl,versionFileUrl,storagePath);
     auto* delegate = new DelegateProtocolImpl(errorCallback,progressCallback,successCallback);
-    delegate->autorelease();
     manager->setDelegate(delegate);
+    manager->_shouldDeleteDelegateWhenExit = true;
     return manager;
 }
 
diff --git a/extensions/AssetsManager/AssetsManager.h b/extensions/AssetsManager/AssetsManager.h
index a1e81302c1..8e0bcd859a 100644
--- a/extensions/AssetsManager/AssetsManager.h
+++ b/extensions/AssetsManager/AssetsManager.h
@@ -211,12 +211,13 @@ private:
     AssetsManagerDelegateProtocol *_delegate; 
     
     bool _isDownloading;
+    bool _shouldDeleteDelegateWhenExit;
     
     std::string key_of_version() const;
     std::string key_of_downloaded_version() const;
 };
 
-class AssetsManagerDelegateProtocol : public Object
+class AssetsManagerDelegateProtocol
 {
 public:
     /* @brief Call back function for error
diff --git a/tools/tojs/cocos2dx_extension.ini b/tools/tojs/cocos2dx_extension.ini
index 6c812165bc..d620fb6753 100644
--- a/tools/tojs/cocos2dx_extension.ini
+++ b/tools/tojs/cocos2dx_extension.ini
@@ -44,6 +44,7 @@ skip = CCBReader::[^CCBReader$ addOwnerCallbackName isJSControlled readByte getC
         EditBox::[(g|s)etDelegate ^keyboard.* touchDownAction getScriptEditBoxHandler registerScriptEditBoxHandler unregisterScriptEditBoxHandler],
         TableView::[create (g|s)etDataSource$ (g|s)etDelegate],
         AssetsManager::[setDelegate],
+        AssetsManagerDelegateProtocol::[*],
         Control::[removeHandleOfControlEvent addHandleOfControlEvent]
 
 rename_functions = CCBReader::[getAnimationManager=getActionManager setAnimationManager=setActionManager],