diff --git a/easyplugin-gui/src/main/java/cc/carm/lib/easyplugin/gui/GUI.java b/easyplugin-gui/src/main/java/cc/carm/lib/easyplugin/gui/GUI.java
index 861823b..8ef7773 100644
--- a/easyplugin-gui/src/main/java/cc/carm/lib/easyplugin/gui/GUI.java
+++ b/easyplugin-gui/src/main/java/cc/carm/lib/easyplugin/gui/GUI.java
@@ -16,12 +16,13 @@ import org.jetbrains.annotations.Nullable;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.UUID;
 import java.util.stream.IntStream;
 
 public class GUI {
 
 	private static JavaPlugin plugin;
-	private static final HashMap<Player, GUI> openedGUIs = new HashMap<>();
+	private static final HashMap<UUID, GUI> openedGUIs = new HashMap<>();
 
 	public static void initialize(JavaPlugin plugin) {
 		GUI.plugin = plugin;
@@ -31,7 +32,7 @@ public class GUI {
 		return plugin;
 	}
 
-	public static HashMap<Player, GUI> getOpenedGUIs() {
+	public static HashMap<UUID, GUI> getOpenedGUIs() {
 		return openedGUIs;
 	}
 
@@ -131,23 +132,31 @@ public class GUI {
 	}
 
 	public void addFlag(String flag, Object obj) {
-		if (this.flags == null) this.flags = new HashMap<>();
+		if (this.flags == null) {
+			this.flags = new HashMap<>();
+		}
 		this.flags.put(flag, obj);
 	}
 
 	public Object getFlag(String flag) {
-		if (this.flags == null) return null;
-		else
+		if (this.flags == null) {
+			return null;
+		} else {
 			return this.flags.get(flag);
+		}
 	}
 
 	public void setFlag(String flag, Object obj) {
-		if (this.flags == null) this.flags = new HashMap<>();
+		if (this.flags == null) {
+			this.flags = new HashMap<>();
+		}
 		this.flags.replace(flag, obj);
 	}
 
 	public void removeFlag(String flag) {
-		if (this.flags == null) this.flags = new HashMap<>();
+		if (this.flags == null) {
+			this.flags = new HashMap<>();
+		}
 		this.flags.remove(flag);
 	}
 
@@ -155,12 +164,17 @@ public class GUI {
 	}
 
 	public void openGUI(Player player) {
-		if (this.type == GUIType.CANCEL) throw new NullPointerException("被取消或不存在的GUI");
+		if (this.type == GUIType.CANCEL) { throw new IllegalStateException("被取消或不存在的GUI"); }
 
 		Inventory inv = Bukkit.createInventory(null, this.type.getSize(), this.name);
 		IntStream.range(0, inv.getSize()).forEach(index -> inv.setItem(index, new ItemStack(Material.AIR)));
 		getItems().forEach((index, item) -> inv.setItem(index, item.getDisplay()));
 
+		GUI previous = getOpenedGUI(player);
+		if(previous != null){
+			previous.listener.close(player);
+		}
+
 		setOpenedGUI(player, this);
 
 		this.inv = inv;
@@ -187,19 +201,19 @@ public class GUI {
 
 
 	public static void setOpenedGUI(Player player, GUI gui) {
-		getOpenedGUIs().put(player, gui);
+		getOpenedGUIs().put(player.getUniqueId(), gui);
 	}
 
 	public static boolean hasOpenedGUI(Player player) {
-		return getOpenedGUIs().containsKey(player);
+		return getOpenedGUIs().containsKey(player.getUniqueId());
 	}
 
 	public static GUI getOpenedGUI(Player player) {
-		return getOpenedGUIs().get(player);
+		return getOpenedGUIs().get(player.getUniqueId());
 	}
 
 	public static void removeOpenedGUI(Player player) {
-		getOpenedGUIs().remove(player);
+		getOpenedGUIs().remove(player.getUniqueId());
 	}
 
 }
diff --git a/easyplugin-gui/src/main/java/cc/carm/lib/easyplugin/gui/GUIListener.java b/easyplugin-gui/src/main/java/cc/carm/lib/easyplugin/gui/GUIListener.java
index 085b6d6..97ee229 100644
--- a/easyplugin-gui/src/main/java/cc/carm/lib/easyplugin/gui/GUIListener.java
+++ b/easyplugin-gui/src/main/java/cc/carm/lib/easyplugin/gui/GUIListener.java
@@ -1,5 +1,6 @@
 package cc.carm.lib.easyplugin.gui;
 
+import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.HandlerList;
@@ -23,10 +24,10 @@ public class GUIListener implements Listener {
 
 	@EventHandler
 	public void onInventoryClickEvent(InventoryClickEvent event) {
-		if (!(event.getWhoClicked() instanceof Player)) return;
+		if (!(event.getWhoClicked() instanceof Player)) { return; }
 		Player player = (Player) event.getWhoClicked();
-		if (!GUI.hasOpenedGUI(player)) return;
-		if (GUI.getOpenedGUI(player) != getCurrentGUI()) return;
+		if (!GUI.hasOpenedGUI(player)) { return;}
+		if (GUI.getOpenedGUI(player) != getCurrentGUI()) { return; }
 
 		getCurrentGUI().rawClickListener(event);
 
@@ -35,11 +36,11 @@ public class GUIListener implements Listener {
 			return;
 		}
 
-		if (event.getClickedInventory() == null) return;
+		if (event.getClickedInventory() == null) { return; }
 
 		if (event.getClickedInventory().equals(getCurrentGUI().inv)) {
 
-			if (getCurrentGUI().cancelOnTarget) event.setCancelled(true);
+			if (getCurrentGUI().cancelOnTarget) { event.setCancelled(true); }
 
 			if (event.getSlot() != -999) {
 				GUIItem clickedItem = getCurrentGUI().getItem(event.getSlot());
@@ -61,7 +62,7 @@ public class GUIListener implements Listener {
 
 	@EventHandler
 	public void onDrag(InventoryDragEvent e) {
-		if (!(e.getWhoClicked() instanceof Player)) return;
+		if (!(e.getWhoClicked() instanceof Player)) { return; }
 		if (e.getInventory().equals(getCurrentGUI().inv)
 				|| e.getInventory().equals(e.getWhoClicked().getInventory())) {
 			getCurrentGUI().onDrag(e);
@@ -70,14 +71,18 @@ public class GUIListener implements Listener {
 
 	@EventHandler
 	public void onInventoryCloseEvent(InventoryCloseEvent event) {
-		if (!(event.getPlayer() instanceof Player)) return;
-		if (!event.getInventory().equals(getCurrentGUI().inv)) return;
+		if (!(event.getPlayer() instanceof Player)) { return; }
+		if (!event.getInventory().equals(getCurrentGUI().inv)) { return; }
 
+		close((Player) event.getPlayer());
+
+	}
+
+	protected void close(Player p){
 		HandlerList.unregisterAll(this);
 		getCurrentGUI().listener = null;
-		GUI.removeOpenedGUI((Player) event.getPlayer());
+		GUI.removeOpenedGUI(p);
 		getCurrentGUI().onClose();
-
 	}
 
 	@EventHandler