diff --git a/Hello3D/BuildQt/mainwindow.cpp b/Hello3D/BuildQt/mainwindow.cpp
index 00b3ceeae8b91cb409dbdc967dd4636e13e4d1b1..8d438b9419c08502bb68c06c95eb31cf0afaf563 100644
--- a/Hello3D/BuildQt/mainwindow.cpp
+++ b/Hello3D/BuildQt/mainwindow.cpp
@@ -48,6 +48,11 @@ void MainWindow::init()
     QTimer *timer = new QTimer(this);
     connect(timer, SIGNAL(timeout()), this, SLOT(update()));
     timer->start(30);//30ms
+
+    label = new QLabel;
+    label->setParent(this);
+    label->setFixedWidth(UI_WIDTH);
+    label->setFixedHeight(UI_HEIGHT);
 }
 
 void MainWindow::paintEvent(QPaintEvent* p)
@@ -56,9 +61,8 @@ void MainWindow::paintEvent(QPaintEvent* p)
     static bool force_update = true;
     void* fb = getUiOfHello3D(NULL, NULL, force_update);
     if(fb){
-        QPainter painter(this);
         QImage img((uchar*)fb, UI_WIDTH, UI_HEIGHT, QImage::Format_RGB16);
-        painter.drawImage(0, 0, img);
+        label->setPixmap(QPixmap::fromImage(img));
         force_update = false;
     }
 }
diff --git a/Hello3D/BuildQt/mainwindow.h b/Hello3D/BuildQt/mainwindow.h
index b8b27148fc957b0501611a89a6a9cdd5bc952477..23300232392c50dc53a3cd22d5b60d5d90d98709 100644
--- a/Hello3D/BuildQt/mainwindow.h
+++ b/Hello3D/BuildQt/mainwindow.h
@@ -2,6 +2,7 @@
 #define MAINWINDOW_H
 
 #include <QMainWindow>
+#include <QLabel>
 
 namespace Ui {
 class MainWindow;
@@ -23,6 +24,8 @@ public:
 private:
     bool            m_is_pressed;
     Ui::MainWindow *ui;
+
+    QLabel         *label;
 };
 
 #endif // MAINWINDOW_H