diff --git a/src/plugin-qt/shortcut/tools/dde-shortcut-tool/powercontroller.cpp b/src/plugin-qt/shortcut/tools/dde-shortcut-tool/powercontroller.cpp
index a4b59ca..078ecad 100644
--- a/src/plugin-qt/shortcut/tools/dde-shortcut-tool/powercontroller.cpp
+++ b/src/plugin-qt/shortcut/tools/dde-shortcut-tool/powercontroller.cpp
@@ -410,7 +410,30 @@ void PowerController::systemTurnOffScreen()
     qInfo() << "PowerController: turn off screen";
 
     if (isWaylandSession()) {
-        // TODO: adapt screen-off for Treeland Wayland (DPMS path TBD).
+        // Wayland/Treeland: use Power1 TurnOffScreen which calls
+        // wlr-output-power-management-v1 to set outputs off.
+        doPrepareSuspend();
+
+        DConfig *config = createPowerConfig(this);
+        const bool screenBlackLock = shouldLockOnScreenBlack(config);
+        if (screenBlackLock) {
+            doLock(true);
+            QThread::msleep(500);
+        }
+
+        QDBusInterface power("org.deepin.dde.Power1", "/org/deepin/dde/Power1",
+                             "org.deepin.dde.Power1", QDBusConnection::systemBus());
+        if (power.isValid()) {
+            power.call("TurnOffScreen");
+        } else {
+            qWarning() << "PowerController: Power1 unavailable for TurnOffScreen";
+        }
+
+        undoPrepareSuspend();
+
+        QFile dpmsState("/tmp/dpms-state");
+        if (dpmsState.open(QIODevice::WriteOnly | QIODevice::Truncate))
+            dpmsState.write("1");
         return;
     }