diff --git a/assets/ArkPetsConfigDefault.json b/assets/ArkPetsConfigDefault.json
index d9677978..2d6970f7 100644
--- a/assets/ArkPetsConfigDefault.json
+++ b/assets/ArkPetsConfigDefault.json
@@ -33,5 +33,6 @@
     "transition_duration":0.3,
     "transition_type":"EASE_OUT_CUBIC",
     "window_style_toolwindow":true,
-    "window_style_topmost":true
+    "window_style_topmost":true,
+    "window_system":"AUTO"
 }
\ No newline at end of file
diff --git a/assets/UI/SettingsModule.fxml b/assets/UI/SettingsModule.fxml
index 08992c70..6910c8a9 100644
--- a/assets/UI/SettingsModule.fxml
+++ b/assets/UI/SettingsModule.fxml
@@ -116,6 +116,11 @@
                     <JFXCheckBox fx:id="configWindowToolwindow" mnemonicParsing="false" text="桌宠作为后台程序启动"/>
                     <JFXButton fx:id="configWindowToolwindowHelp"/>
                 </HBox>
+                <HBox>
+                    <Label text="窗口系统"/>
+                    <JFXComboBox fx:id="configWindowSystem" prefWidth="100.0"/>
+                    <JFXButton fx:id="configWindowSystemHelp"/>
+                </HBox>
                 <Separator/>
                 <HBox>
                     <Label text="日志级别"/>
diff --git a/core/src/cn/harryh/arkpets/ArkConfig.java b/core/src/cn/harryh/arkpets/ArkConfig.java
index aea4c781..0df5d7e5 100644
--- a/core/src/cn/harryh/arkpets/ArkConfig.java
+++ b/core/src/cn/harryh/arkpets/ArkConfig.java
@@ -3,6 +3,7 @@
  */
 package cn.harryh.arkpets;
 
+import cn.harryh.arkpets.platform.WindowSystem;
 import cn.harryh.arkpets.transitions.EasingFunction;
 import cn.harryh.arkpets.utils.IOUtils.FileUtil;
 import cn.harryh.arkpets.utils.Logger;
@@ -100,6 +101,8 @@ public class ArkConfig implements Serializable {
     public boolean      window_style_toolwindow;
     /** @since ArkPets 3.2 */ @JSONField(defaultValue = "true")
     public boolean      window_style_topmost;
+    /** @since ArkPets 4.0 */ @JSONField(defaultValue = "AUTO")
+    public String       window_system;
 
     private ArkConfig() {
     }
@@ -175,6 +178,17 @@ public static EasingFunction getEasingFunctionFrom(String string) {
         }
     }
 
+    /** @see WindowSystem
+     */
+    public static WindowSystem getWindowSystemFrom(String string) {
+        try {
+            return WindowSystem.valueOf(string);
+        } catch (IllegalArgumentException e) {
+            Logger.warn("Config", "Invalid window system, using auto detect");
+            return WindowSystem.AUTO;
+        }
+    }
+
     /** @see com.badlogic.gdx.graphics.Color
      */
     public static Color getGdxColorFrom(String string) {
diff --git a/core/src/cn/harryh/arkpets/concurrent/ProcessPool.java b/core/src/cn/harryh/arkpets/concurrent/ProcessPool.java
index f5018b42..7cced10b 100644
--- a/core/src/cn/harryh/arkpets/concurrent/ProcessPool.java
+++ b/core/src/cn/harryh/arkpets/concurrent/ProcessPool.java
@@ -6,6 +6,7 @@
 import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
 import java.util.concurrent.*;
 
 
@@ -67,6 +68,8 @@ public Future<ProcessResult> submit(Class<?> clazz, List<String> jvmArgs, List<S
                 command.addAll(args);
             // Process execution
             ProcessBuilder builder = new ProcessBuilder(command);
+            Map<String, String> env = builder.environment();
+            env.remove("GDK_BACKEND");
             Process process = builder.inheritIO().start();
             int exitValue = process.waitFor();
             return new ProcessResult(exitValue, process.pid());
diff --git a/core/src/cn/harryh/arkpets/platform/NullHWndCtrl.java b/core/src/cn/harryh/arkpets/platform/NullHWndCtrl.java
index b191f343..5226562d 100644
--- a/core/src/cn/harryh/arkpets/platform/NullHWndCtrl.java
+++ b/core/src/cn/harryh/arkpets/platform/NullHWndCtrl.java
@@ -4,11 +4,27 @@
 package cn.harryh.arkpets.platform;
 
 
+import com.badlogic.gdx.Gdx;
+
+
 public class NullHWndCtrl extends HWndCtrl {
+    private static boolean startupFind;
+    private int lastw, lasth;
+
     public NullHWndCtrl() {
         super("", new WindowRect());
     }
 
+    public static NullHWndCtrl find(String className, String windowName) {
+        if (windowName.equals("ArkPets")) {
+            if (!NullHWndCtrl.startupFind) {
+                NullHWndCtrl.startupFind = true;
+                return null;
+            }
+        }
+        return new NullHWndCtrl();
+    }
+
     @Override
     public boolean isForeground() {
         return false;
@@ -35,6 +51,11 @@ public void setForeground() {
 
     @Override
     public void setWindowPosition(HWndCtrl insertAfter, int x, int y, int w, int h) {
+        if (lasth != h || lastw != w) {
+            lasth = h;
+            lastw = w;
+            Gdx.graphics.setWindowedMode(w, h);
+        }
     }
 
     @Override
diff --git a/core/src/cn/harryh/arkpets/platform/WindowSystem.java b/core/src/cn/harryh/arkpets/platform/WindowSystem.java
index abfa11c6..5966ad22 100644
--- a/core/src/cn/harryh/arkpets/platform/WindowSystem.java
+++ b/core/src/cn/harryh/arkpets/platform/WindowSystem.java
@@ -41,10 +41,24 @@ public static WindowSystem detectWindowSystem() {
     }
 
     /** Initializes the platform window system.
+     * @param platform WindowSystem to initialize.
      */
-    public static void init() {
-        PLATFORM = detectWindowSystem();
+    public static void init(WindowSystem platform) {
+        PLATFORM = platform;
+        if (PLATFORM == WindowSystem.AUTO){
+            PLATFORM = detectWindowSystem();
+        }
         Logger.info("System", "Using " + PLATFORM.toString() + " Window System");
+        switch (PLATFORM) {
+            // TODO
+        }
+    }
+
+    /** Get current WindowSystem.
+     * @return The current WindowSystem.
+     */
+    public static WindowSystem getWindowSystem() {
+        return PLATFORM;
     }
 
     /** Finds a window.
@@ -58,7 +72,7 @@ public static HWndCtrl findWindow(String className, String windowText) {
                 return User32HWndCtrl.find(className, windowText);
             }
             default -> {
-                return new NullHWndCtrl();
+                return NullHWndCtrl.find(className, windowText);
             }
         }
     }
@@ -97,4 +111,23 @@ public static HWndCtrl getTopmostWindow() {
     public static void free() {
         // TODO
     }
+
+    /** Return current WindowSystem should enable resize.
+     */
+    public static boolean needResize() {
+        switch (PLATFORM) {
+            case X11, MUTTER, KWIN -> {
+                return true;
+            }
+            default -> {
+                return false;
+            }
+        }
+    }
+
+    /** Return current WindowSystem should enable decoration.
+     */
+    public static boolean needDecorated() {
+        return PLATFORM == NULL;
+    }
 }
diff --git a/desktop/src/cn/harryh/arkpets/EmbeddedLauncher.java b/desktop/src/cn/harryh/arkpets/EmbeddedLauncher.java
index 70776e5d..588eeea6 100644
--- a/desktop/src/cn/harryh/arkpets/EmbeddedLauncher.java
+++ b/desktop/src/cn/harryh/arkpets/EmbeddedLauncher.java
@@ -32,7 +32,7 @@ public static void main (String[] args) {
         ArgPending.argCache = args;
         // Logger
         Logger.initialize(LogConfig.logCorePath, LogConfig.logCoreMaxKeep);
-        ArkConfig appConfig = Objects.requireNonNull(ArkConfig.getConfig());
+        ArkConfig appConfig = Objects.requireNonNull(ArkConfig.getConfig(), "ArkConfig returns a null instance, please check the config file.");
         try {
             Logger.setLevel(appConfig.logging_level);
         } catch (Exception ignored) {
@@ -82,16 +82,16 @@ protected void process(String command, String addition) {
         Logger.info("System", "Entering the app of EmbeddedLauncher");
         Logger.info("System", "ArkPets version is " + appVersion);
         Logger.debug("System", "Default charset is " + Charset.defaultCharset());
-
+        WindowSystem windowSystem = ArkConfig.getWindowSystemFrom(appConfig.window_system);
         try {
-            WindowSystem.init();
+            WindowSystem.init(windowSystem);
             Lwjgl3ApplicationConfiguration config = new Lwjgl3ApplicationConfiguration();
             // Configure FPS
             config.setForegroundFPS(fpsDefault);
             config.setIdleFPS(fpsDefault);
             // Configure window layout
-            config.setDecorated(false);
-            config.setResizable(false);
+            config.setDecorated(WindowSystem.needDecorated());
+            config.setResizable(WindowSystem.needResize());
             config.setWindowedMode(coreWidthDefault, coreHeightDefault);
             config.setWindowPosition(0, 0);
             // Configure window title
diff --git a/desktop/src/cn/harryh/arkpets/controllers/SettingsModule.java b/desktop/src/cn/harryh/arkpets/controllers/SettingsModule.java
index 19d1e61f..24cdce29 100644
--- a/desktop/src/cn/harryh/arkpets/controllers/SettingsModule.java
+++ b/desktop/src/cn/harryh/arkpets/controllers/SettingsModule.java
@@ -9,10 +9,12 @@
 import cn.harryh.arkpets.guitasks.CheckAppUpdateTask;
 import cn.harryh.arkpets.guitasks.GuiTask;
 import cn.harryh.arkpets.platform.StartupConfig;
+import cn.harryh.arkpets.platform.WindowSystem;
 import cn.harryh.arkpets.utils.*;
 import cn.harryh.arkpets.utils.GuiComponents.*;
 import com.badlogic.gdx.graphics.Color;
 import com.jfoenix.controls.*;
+import com.sun.jna.Platform;
 import javafx.concurrent.ScheduledService;
 import javafx.concurrent.Task;
 import javafx.fxml.FXML;
@@ -25,6 +27,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
@@ -92,6 +95,10 @@ public final class SettingsModule implements Controller<ArkHomeFX> {
     @FXML
     private JFXButton configWindowToolwindowHelp;
 
+    @FXML
+    private JFXComboBox<NamedItem<String>> configWindowSystem;
+    @FXML
+    private JFXButton configWindowSystemHelp;
     @FXML
     private Label aboutQueryUpdate;
     @FXML
@@ -350,6 +357,62 @@ public String getContent() {
                 };
             }
         };
+
+        NamedItem<String>[] items = (NamedItem[]) getWindowSystemItems().toArray();
+        new ComboBoxSetup<>(configWindowSystem).setItems(items)
+                .selectValue(app.config.window_system, app.config.window_system)
+                .setOnNonNullValueUpdated((observable, oldValue, newValue) -> {
+                    app.config.window_system = newValue.value();
+                    app.config.save();
+                });
+        new HelpHandbookEntrance(app.body, configWindowSystemHelp) {
+            @Override
+            public Handbook getHandbook() {
+                return new ControlHelpHandbook((Labeled) configWindowSystem.getParent().getChildrenUnmodifiable().get(0)) {
+                    @Override
+                    public String getContent() {
+                        return getWindowSystemInfo();
+                    }
+                };
+            }
+        };
+    }
+
+    private static ArrayList<NamedItem<String>> getWindowSystemItems() {
+        ArrayList<NamedItem<String>> windowSystemItems = new ArrayList<>();
+        windowSystemItems.add(new NamedItem<>("自动", WindowSystem.AUTO.name()));
+        if (Platform.isWindows()) {
+            windowSystemItems.add(new NamedItem<>("User32", WindowSystem.USER32.name()));
+        }
+        if (Platform.isLinux()) {
+            windowSystemItems.add(new NamedItem<>("X11", WindowSystem.X11.name()));
+            windowSystemItems.add(new NamedItem<>("Mutter", WindowSystem.MUTTER.name()));
+            windowSystemItems.add(new NamedItem<>("KWin", WindowSystem.KWIN.name()));
+        }
+        if (Platform.isMac()) {
+            windowSystemItems.add(new NamedItem<>("Quartz", WindowSystem.QUARTZ.name()));
+        }
+        windowSystemItems.add(new NamedItem<>("NULL", WindowSystem.NULL.name()));
+        return windowSystemItems;
+    }
+
+    private static String getWindowSystemInfo() {
+        String content = "不同平台对于窗口查询、操作有不同的 API，除非你遇到了桌宠窗口的问题，否则通常不需要更改。以下是对 API 的简单介绍：\n";
+        if (Platform.isWindows()) {
+            content += "User32 —— Windows 窗口系统。\n";
+        }
+        if (Platform.isLinux()) {
+            content += """
+                    Mutter —— GNOME 环境，需要安装集成扩展。
+                    KWin —— KDE 环境，需要安装集成插件。
+                    X11 —— 通用 X11 环境支持，适用于 Xfce,Mate,LXDE 等环境。
+                    """;
+        }
+        if (Platform.isMac()) {
+            content += "Quartz —— MacOS Quartz 窗口系统。\n";
+        }
+        content += "NULL —— 空实现，桌宠不会有任何窗口交互。";
+        return content;
     }
 
     private void initAbout() {