diff --git a/src/widgets/common/downloaditem.cpp b/src/widgets/common/downloaditem.cpp
index 8142790..ac5bbf6 100644
--- a/src/widgets/common/downloaditem.cpp
+++ b/src/widgets/common/downloaditem.cpp
@@ -64,9 +64,9 @@ QString DownloadItem::getName()
 
 /***************************************************************
   *  @brief     告知界面，准备安装
-  *  @param     
+  *  @param
   *  @note      如果正在安装，返回-1
-  *  @Sample usage:     DownloadItem::install(0); 
+  *  @Sample usage:     DownloadItem::install(0);
  **************************************************************/
 int DownloadItem::readyInstall()
 {
@@ -110,9 +110,9 @@ void DownloadItem::setSpeed(QString s)
 
 /***************************************************************
   *  @brief     安装当前应用
-  *  @param     int t, t为安装方式，可以为 0,1,2 
+  *  @param     int t, t为安装方式，可以为 0,1,2
   *  @note      执行这个函数时，需要已经检查是否可以安装，但该函数仍然会再检测一次！
-  *  @Sample usage:     DownloadItem::install(0); 
+  *  @Sample usage:     DownloadItem::install(0);
  **************************************************************/
 void DownloadItem::install(int t)
 {
@@ -165,9 +165,9 @@ void DownloadItem::on_pushButton_3_clicked()
 
 /***************************************************************
   *  @brief     实际安装应用
-  *  @param     int t, t为安装方式，可以为 0,1,2 
+  *  @param     int t, t为安装方式，可以为 0,1,2
   *  @note      备注
-  *  @Sample usage:     slotAsyncInstall(0); 
+  *  @Sample usage:     slotAsyncInstall(0);
  **************************************************************/
 void DownloadItem::slotAsyncInstall(int t)
 {
@@ -238,5 +238,5 @@ void DownloadItem::slotAsyncInstall(int t)
 
     ui->widget_spinner->hide();
     DownloadItem::isInstall = false;
-    emit finished();
+    emit finished(error == 0 && !haveError && !notRoot);
 }
diff --git a/src/widgets/common/downloaditem.h b/src/widgets/common/downloaditem.h
index b00c3ee..13c2d2b 100644
--- a/src/widgets/common/downloaditem.h
+++ b/src/widgets/common/downloaditem.h
@@ -62,7 +62,7 @@ private slots:
     void slotAsyncInstall(int t);
 
 signals:
-    void finished();
+    void finished(bool success);
 };
 
 #endif // DOWNLOADITEM_H
diff --git a/src/widgets/downloadlistwidget.cpp b/src/widgets/downloadlistwidget.cpp
index 8cd666c..89fa8ba 100644
--- a/src/widgets/downloadlistwidget.cpp
+++ b/src/widgets/downloadlistwidget.cpp
@@ -91,10 +91,14 @@ DownloadItem* DownloadListWidget::addItem(QString name, QString fileName, QStrin
     {
         return nullptr;
     }
+
     urList.append(downloadurl);
     allDownload += 1;
     toDownload += 1;
+
     DownloadItem *di = new DownloadItem;
+    connect(di, &DownloadItem::finished, this, &DownloadListWidget::slotInstallFinished, Qt::QueuedConnection);
+
     dlist << downloadurl;
     downloaditemlist << di;
     di->setName(name);
@@ -167,22 +171,9 @@ void DownloadListWidget::httpFinished() // 完成下载
         {
             continue;
         }
-        toDownload -= 1; // 安装完以后减少待安装数目
-        qDebug() << "Download: 还没有下载的数目：" << toDownload;
-
-        if (toDownload == 0)
-        {
-            Application *app = qobject_cast<Application *>(qApp);
-            MainWindow *mainWindow = app->mainWindow();
-            if (mainWindow->isCloseWindowAnimation() == true)
-            {
-                qDebug() << "Download: 后台安装结束，退出程序";
-                qApp->quit();
-            }
-        }
-
         downloaditemlist[nowDownload - 1]->free = true;
         emit downloadFinished();
+
         if (nowDownload < allDownload)
         {
             // 如果有排队则下载下一个
@@ -241,3 +232,23 @@ void DownloadListWidget::on_pushButton_clicked()
 {
     QDesktopServices::openUrl(QUrl("file:///tmp/spark-store", QUrl::TolerantMode));
 }
+
+void DownloadListWidget::slotInstallFinished(bool success)
+{
+    // NOTE: 仅在安装成功后判断是否需要退出后台
+    if (success) {
+        toDownload -= 1; // 安装完以后减少待安装数目
+        qDebug() << "Download: 还没有下载的数目：" << toDownload;
+
+        if (toDownload == 0)
+        {
+            Application *app = qobject_cast<Application *>(qApp);
+            MainWindow *mainWindow = app->mainWindow();
+            if (mainWindow->isCloseWindowAnimation() == true)
+            {
+                qDebug() << "Download: 后台安装结束，退出程序";
+                qApp->quit();
+            }
+        }
+    }
+}
diff --git a/src/widgets/downloadlistwidget.h b/src/widgets/downloadlistwidget.h
index 09517f5..6faebc0 100644
--- a/src/widgets/downloadlistwidget.h
+++ b/src/widgets/downloadlistwidget.h
@@ -60,6 +60,7 @@ signals:
 
 private slots:
     void on_pushButton_clicked();
+    void slotInstallFinished(bool success);
 };
 
 #endif // DOWNLOADLISTWIDGET_H