diff --git a/doric-Qt/example/doric/DoricContext.cpp b/doric-Qt/example/doric/DoricContext.cpp
index 15caec45..0123e5ad 100644
--- a/doric-Qt/example/doric/DoricContext.cpp
+++ b/doric-Qt/example/doric/DoricContext.cpp
@@ -19,6 +19,8 @@ DoricContext::~DoricContext() {
   QVariantList args;
   callEntity(DoricConstant::DORIC_ENTITY_DESTROY, args);
   DoricContextManager::getInstance()->destroyContext(this);
+  QList<QObject *> plugins = mPluginMap.values();
+  foreach (QObject *plugin, plugins) { delete plugin; }
 }
 
 DoricContext *DoricContext::create(QString script, QString source,
diff --git a/doric-Qt/example/doric/plugin/DoricNotificationPlugin.cpp b/doric-Qt/example/doric/plugin/DoricNotificationPlugin.cpp
index ea859d65..00aaa33d 100644
--- a/doric-Qt/example/doric/plugin/DoricNotificationPlugin.cpp
+++ b/doric-Qt/example/doric/plugin/DoricNotificationPlugin.cpp
@@ -53,6 +53,7 @@ void DoricNotificationPlugin::subscribe(QString jsValueString,
         args.append(data);
         DoricPromise::resolve(getContext(), notificationCallbackId, args);
       });
+  subscriptions.append(subscribeId);
 
   getContext()->getDriver()->asyncCall(
       [this, callbackId, notificationCallbackId] {
@@ -68,7 +69,9 @@ void DoricNotificationPlugin::unsubscribe(QString jsValueString,
   QJsonDocument document = QJsonDocument::fromJson(jsValueString.toUtf8());
   QJsonValue jsValue = document.object();
 
-  DoricGlobalBroadcast::getInstance()->unsubscribe(jsValueString);
+  QString subscribeId = jsValueString;
+  DoricGlobalBroadcast::getInstance()->unsubscribe(subscribeId);
+  subscriptions.removeOne(subscribeId);
 
   getContext()->getDriver()->asyncCall(
       [this, callbackId] {
@@ -77,3 +80,9 @@ void DoricNotificationPlugin::unsubscribe(QString jsValueString,
       },
       DoricThreadMode::JS);
 }
+
+DoricNotificationPlugin::~DoricNotificationPlugin() {
+  foreach (QString subscribeId, this->subscriptions) {
+    DoricGlobalBroadcast::getInstance()->unsubscribe(subscribeId);
+  }
+}
diff --git a/doric-Qt/example/doric/plugin/DoricNotificationPlugin.h b/doric-Qt/example/doric/plugin/DoricNotificationPlugin.h
index 3422352d..28358fe8 100644
--- a/doric-Qt/example/doric/plugin/DoricNotificationPlugin.h
+++ b/doric-Qt/example/doric/plugin/DoricNotificationPlugin.h
@@ -5,17 +5,17 @@
 
 #include "DoricNativePlugin.h"
 
-#include <QUdpSocket>
-
 class DORIC_EXPORT DoricNotificationPlugin : public DoricNativePlugin {
   Q_OBJECT
 
 private:
-  QUdpSocket udpSocket;
+  QList<QString> subscriptions;
 
 public:
   using DoricNativePlugin::DoricNativePlugin;
 
+  ~DoricNotificationPlugin();
+
   Q_INVOKABLE void publish(QString jsValueString, QString callbackId);
 
   Q_INVOKABLE void subscribe(QString jsValueString, QString callbackId);
diff --git a/doric-Qt/example/doric/utils/DoricGlobalBroadcast.cpp b/doric-Qt/example/doric/utils/DoricGlobalBroadcast.cpp
index 05b60e8a..3cc17357 100644
--- a/doric-Qt/example/doric/utils/DoricGlobalBroadcast.cpp
+++ b/doric-Qt/example/doric/utils/DoricGlobalBroadcast.cpp
@@ -42,7 +42,11 @@ void DoricGlobalBroadcast::unsubscribe(QString subscribeId) {
     QList<QPair<QString, std::function<void(QString)>>> value =
         this->subjects[targetKey];
     value.removeAt(targetIndex);
-    this->subjects.insert(targetKey, value);
+    if (value.size() == 0) {
+      this->subjects.remove(targetKey);
+    } else {
+      this->subjects.insert(targetKey, value);
+    }
   }
 }