diff --git a/example/main.cpp b/example/main.cpp
index 76e09765..066e0541 100644
--- a/example/main.cpp
+++ b/example/main.cpp
@@ -12,6 +12,8 @@ int main(int argc, char *argv[])
 {
     //将样式设置为Basic，不然会导致组件显示异常
     qputenv("QT_QUICK_CONTROLS_STYLE","Basic");
+    //6.4及以下监听系统深色模式变化
+    qputenv("QT_QPA_PLATFORM","windows:darkmode=2");
     QCoreApplication::setOrganizationName("ZhuZiChu");
     QCoreApplication::setOrganizationDomain("https://zhuzichu520.github.io");
     QCoreApplication::setApplicationName("FluentUI");
diff --git a/src/FluTheme.cpp b/src/FluTheme.cpp
index f8e5b943..46b810f7 100644
--- a/src/FluTheme.cpp
+++ b/src/FluTheme.cpp
@@ -34,6 +34,7 @@ bool FluTheme::eventFilter(QObject *obj, QEvent *event)
     Q_UNUSED(obj);
     if (event->type() == QEvent::ApplicationPaletteChange)
     {
+        qDebug()<<"--------->";
         Q_EMIT darkChanged();
         event->accept();
         return true;
@@ -43,7 +44,7 @@ bool FluTheme::eventFilter(QObject *obj, QEvent *event)
 
 bool FluTheme::systemDark()
 {
-    QPalette palette = (qobject_cast<QGuiApplication *>(QCoreApplication::instance()))->palette();
+    QPalette palette = (qobject_cast<QGuiApplication *>(QGuiApplication::instance()))->palette();
     QColor color = palette.color(QPalette::Window).rgb();
     return !(color.red() * 0.2126 + color.green() * 0.7152 + color.blue() * 0.0722 > 255 / 2);
 }