diff --git a/car.cpp b/car.cpp
index 7a3c162..fcb0d1e 100644
--- a/car.cpp
+++ b/car.cpp
@@ -34,6 +34,7 @@ Car::Car(ParkingLotManager * manager, QGraphicsItem *parent, int dir, Car::Color
     connect(posAni,QPropertyAnimation::finished,this,followPath);
     connect(this, &Car::queueHead, manager, &ParkingLotManager::requestIn);
     connect(this, &Car::exit, manager, &ParkingLotManager::leave);
+    connect(this, &Car::stair, manager, &ParkingLotManager::requestStair);
 }
 
 void Car::Forward(qreal vel)
diff --git a/parkingLotManager.cpp b/parkingLotManager.cpp
index 2a543b3..a9bb234 100644
--- a/parkingLotManager.cpp
+++ b/parkingLotManager.cpp
@@ -134,6 +134,16 @@ void ParkingLotManager::requestOut(Car *car, int exit)
     Path *p; // TODO：请求出口
 }
 
+void ParkingLotManager::requestStair(Car *car)
+{
+    int l = car->getFloor();
+    int n = car->getNum();
+    int e = car->getEntryNum();
+    Path *p = m_graph[l]->findPath(NODE_TYPE::stair, e, NODE_TYPE::space, n);
+    car->setPath(p);
+    car->followPath();
+}
+
 void ParkingLotManager::requestIn(Car* car)
 {
     int entry = car->getEntryNum();
diff --git a/parkingLotManager.h b/parkingLotManager.h
index 85a8994..85d533b 100644
--- a/parkingLotManager.h
+++ b/parkingLotManager.h
@@ -34,6 +34,7 @@ public:
 public slots:
     void requestIn(Car* car);
     void requestOut(Car* car, int exit = -1);
+    void requestStair(Car* car);
     void leave(Car* car);
     void addCar(int entry = -1);