diff --git a/python/global_hotkey.py b/python/global_hotkey.py
new file mode 100644
index 0000000..c5794fd
--- /dev/null
+++ b/python/global_hotkey.py
@@ -0,0 +1,98 @@
+from __future__ import annotations
+
+import argparse
+import ctypes
+import sys
+import threading
+from ctypes import wintypes
+
+HOTKEY_ID = 0x4F4B
+WM_HOTKEY = 0x0312
+WM_QUIT = 0x0012
+MOD_ALT = 0x0001
+MOD_CONTROL = 0x0002
+MOD_NOREPEAT = 0x4000
+VK_S = 0x53
+SYNCHRONIZE = 0x00100000
+INFINITE = 0xFFFFFFFF
+
+
+def start_parent_watch(parent_pid: int, message_thread_id: int, user32: ctypes.WinDLL) -> None:
+    if parent_pid <= 0:
+        return
+
+    kernel32 = ctypes.WinDLL("kernel32", use_last_error=True)
+    open_process = kernel32.OpenProcess
+    open_process.argtypes = [wintypes.DWORD, wintypes.BOOL, wintypes.DWORD]
+    open_process.restype = wintypes.HANDLE
+    wait_for_single_object = kernel32.WaitForSingleObject
+    wait_for_single_object.argtypes = [wintypes.HANDLE, wintypes.DWORD]
+    wait_for_single_object.restype = wintypes.DWORD
+    close_handle = kernel32.CloseHandle
+    close_handle.argtypes = [wintypes.HANDLE]
+    close_handle.restype = wintypes.BOOL
+    post_thread_message = user32.PostThreadMessageW
+    post_thread_message.argtypes = [wintypes.DWORD, wintypes.UINT, wintypes.WPARAM, wintypes.LPARAM]
+    post_thread_message.restype = wintypes.BOOL
+
+    handle = open_process(SYNCHRONIZE, False, parent_pid)
+    if not handle:
+        return
+
+    def wait_for_parent() -> None:
+        try:
+            wait_for_single_object(handle, INFINITE)
+            post_thread_message(message_thread_id, WM_QUIT, 0, 0)
+        finally:
+            close_handle(handle)
+
+    threading.Thread(target=wait_for_parent, name="ok-hotkey-parent-watch", daemon=True).start()
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--parent-pid", type=int, default=0)
+    args = parser.parse_args()
+
+    if sys.platform != "win32":
+        print("UNSUPPORTED", flush=True)
+        return 3
+
+    user32 = ctypes.WinDLL("user32", use_last_error=True)
+    kernel32 = ctypes.WinDLL("kernel32", use_last_error=True)
+    register_hot_key = user32.RegisterHotKey
+    register_hot_key.argtypes = [wintypes.HWND, ctypes.c_int, wintypes.UINT, wintypes.UINT]
+    register_hot_key.restype = wintypes.BOOL
+    unregister_hot_key = user32.UnregisterHotKey
+    unregister_hot_key.argtypes = [wintypes.HWND, ctypes.c_int]
+    unregister_hot_key.restype = wintypes.BOOL
+    get_message = user32.GetMessageW
+    get_message.argtypes = [ctypes.POINTER(wintypes.MSG), wintypes.HWND, wintypes.UINT, wintypes.UINT]
+    get_message.restype = ctypes.c_int
+    get_current_thread_id = kernel32.GetCurrentThreadId
+    get_current_thread_id.restype = wintypes.DWORD
+
+    modifiers = MOD_CONTROL | MOD_ALT | MOD_NOREPEAT
+    if not register_hot_key(None, HOTKEY_ID, modifiers, VK_S):
+        print(f"ERROR register_hotkey {ctypes.get_last_error()}", flush=True)
+        return 2
+
+    start_parent_watch(args.parent_pid, get_current_thread_id(), user32)
+    print("READY", flush=True)
+    message = wintypes.MSG()
+    try:
+        while True:
+            result = get_message(ctypes.byref(message), None, 0, 0)
+            if result == -1:
+                print(f"ERROR get_message {ctypes.get_last_error()}", flush=True)
+                return 4
+            if result == 0:
+                return 0
+            if message.message == WM_HOTKEY and message.wParam == HOTKEY_ID:
+                print("TRIGGER", flush=True)
+    finally:
+        unregister_hot_key(None, HOTKEY_ID)
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/src/backgroundScreenshot.ts b/src/backgroundScreenshot.ts
new file mode 100644
index 0000000..a0a77f0
--- /dev/null
+++ b/src/backgroundScreenshot.ts
@@ -0,0 +1,42 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import * as vscode from 'vscode';
+import { tr } from './localization';
+import { resolveProjectDir, templatesDirectory } from './projectConfig';
+import { captureGameWindow } from './screenshotCapture';
+
+/**
+ * Capture directly into the template authoring directory without revealing an IDE panel.
+ *
+ * The system-wide hotkey uses this path so pressing Ctrl+Alt+S while the game is focused
+ * does not bring VS Code to the foreground before capture. The actual window capture still
+ * goes through the same captureGameWindow implementation used by the normal asset panel.
+ */
+export async function captureTemplateScreenshotInBackground(): Promise<boolean> {
+  const folder = vscode.workspace.workspaceFolders?.[0];
+  if (!folder) {
+    void vscode.window.showWarningMessage(tr('No workspace folder open.'));
+    return false;
+  }
+
+  const projectRoot = resolveProjectDir() || folder.uri.fsPath;
+  const outputDir = path.join(projectRoot, templatesDirectory(projectRoot));
+  fs.mkdirSync(outputDir, { recursive: true });
+
+  const now = new Date();
+  const ts = `${now.getFullYear()}${String(now.getMonth() + 1).padStart(2, '0')}${String(now.getDate()).padStart(2, '0')}_${String(now.getHours()).padStart(2, '0')}${String(now.getMinutes()).padStart(2, '0')}${String(now.getSeconds()).padStart(2, '0')}`;
+  const outputPath = path.join(outputDir, `screenshot_${ts}.png`);
+
+  const outcome = await captureGameWindow(outputPath);
+  if (!outcome.ok) {
+    if (outcome.reason === 'noScript') {
+      void vscode.window.showErrorMessage(tr('Screenshot script not found. capture_game_window.py is missing from the extension.'));
+    } else if (outcome.reason === 'failed') {
+      void vscode.window.showErrorMessage(tr('Screenshot failed: {error}', { error: outcome.error || '' }));
+    }
+    return false;
+  }
+
+  void vscode.window.showInformationMessage(tr('Screenshot saved: {name}', { name: path.basename(outputPath) }));
+  return true;
+}
diff --git a/src/entrypoint.ts b/src/entrypoint.ts
index 606a961..82a1cb4 100644
--- a/src/entrypoint.ts
+++ b/src/entrypoint.ts
@@ -1,8 +1,12 @@
 import * as fs from 'fs';
 import * as path from 'path';
 import * as vscode from 'vscode';
+import { captureTemplateScreenshotInBackground } from './backgroundScreenshot';
 import { activate as activateCore, deactivate as deactivateCore } from './extension';
+import { GlobalScreenshotHotkey } from './globalScreenshotHotkey';
 import { resolveProjectDir } from './projectConfig';
+import { getProjectConfig } from './screenshotCapture';
+import { repaintAllAssetGalleries } from './templateAssetPanel';
 
 const WALKTHROUGH_ID = 'okScriptToolkit.getStarted';
 const PROJECT_READY_CONTEXT = 'okScriptToolkit.projectReady';
@@ -30,6 +34,16 @@ function isSupportedProject(projectDir: string): boolean {
 export function activate(context: vscode.ExtensionContext): void {
   activateCore(context);
 
+  const globalScreenshotHotkey = new GlobalScreenshotHotkey(
+    context.extensionPath,
+    () => getProjectConfig().pythonPath,
+    () => {
+      void captureTemplateScreenshotInBackground().then((captured) => {
+        if (captured) repaintAllAssetGalleries();
+      });
+    },
+  );
+
   const updateProjectReady = () => vscode.commands.executeCommand(
     'setContext',
     PROJECT_READY_CONTEXT,
@@ -95,6 +109,7 @@ export function activate(context: vscode.ExtensionContext): void {
       }
     }),
     new vscode.Disposable(disposeConfigWatchers),
+    globalScreenshotHotkey,
   );
 
   void updateProjectReady();
diff --git a/src/globalScreenshotHotkey.ts b/src/globalScreenshotHotkey.ts
new file mode 100644
index 0000000..8fc742a
--- /dev/null
+++ b/src/globalScreenshotHotkey.ts
@@ -0,0 +1,144 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import { ChildProcess, spawn } from 'child_process';
+
+const INITIAL_RETRY_DELAY_MS = 2_000;
+const MAX_RETRY_DELAY_MS = 30_000;
+
+/**
+ * Windows 系统级 Ctrl+Alt+S 监听器。
+ *
+ * VS Code 的 contributes.keybindings 只能在 VS Code 获得焦点时触发；这里启动一个
+ * 仅依赖 Python 标准库的轻量辅助进程，通过 RegisterHotKey 收到系统级快捷键后把
+ * TRIGGER 事件转回扩展宿主。截图本身仍由现有 command/面板链路完成。
+ */
+export class GlobalScreenshotHotkey {
+  private child: ChildProcess | undefined;
+  private generation = 0;
+  private disposed = false;
+  private retryTimer: NodeJS.Timeout | undefined;
+  private retryDelayMs = INITIAL_RETRY_DELAY_MS;
+
+  constructor(
+    private readonly extensionPath: string,
+    private readonly resolvePythonPath: () => string,
+    private readonly onTrigger: () => void,
+    private readonly log: (message: string) => void = (message) => console.log(`[ok-script Toolkit] ${message}`),
+  ) {
+    this.start();
+  }
+
+  dispose(): void {
+    if (this.disposed) return;
+    this.disposed = true;
+    this.clearRetry();
+    this.stop();
+  }
+
+  private start(): void {
+    if (this.disposed || process.platform !== 'win32') return;
+
+    this.clearRetry();
+    const scriptPath = path.join(this.extensionPath, 'python', 'global_hotkey.py');
+    if (!fs.existsSync(scriptPath)) {
+      this.log(`Global screenshot hotkey helper not found: ${scriptPath}`);
+      return;
+    }
+
+    const generation = ++this.generation;
+    let stdoutBuffer = '';
+
+    try {
+      const pythonPath = this.resolvePythonPath();
+      const child = spawn(pythonPath, [scriptPath, '--parent-pid', String(process.pid)], {
+        windowsHide: true,
+        stdio: ['ignore', 'pipe', 'pipe'],
+      });
+      this.child = child;
+
+      child.stdout?.setEncoding('utf8');
+      child.stdout?.on('data', (chunk: string) => {
+        if (generation !== this.generation || this.disposed) return;
+        stdoutBuffer += chunk;
+        while (true) {
+          const newline = stdoutBuffer.indexOf('\n');
+          if (newline < 0) break;
+          const line = stdoutBuffer.slice(0, newline).trim();
+          stdoutBuffer = stdoutBuffer.slice(newline + 1);
+          this.handleLine(line);
+        }
+      });
+
+      child.stderr?.setEncoding('utf8');
+      child.stderr?.on('data', (chunk: string) => {
+        if (generation === this.generation && !this.disposed) {
+          const text = chunk.trim();
+          if (text) this.log(`Global screenshot hotkey helper stderr: ${text}`);
+        }
+      });
+
+      child.on('error', (error) => {
+        if (generation === this.generation && !this.disposed) {
+          this.log(`Failed to start global screenshot hotkey helper: ${error.message}`);
+          this.scheduleRetry();
+        }
+      });
+
+      child.on('close', (code) => {
+        if (generation !== this.generation) return;
+        if (this.child === child) this.child = undefined;
+        if (!this.disposed && code !== 0) {
+          this.log(`Global screenshot hotkey helper exited with code ${code ?? 'unknown'}`);
+          this.scheduleRetry();
+        }
+      });
+    } catch (error) {
+      const message = error instanceof Error ? error.message : String(error);
+      this.log(`Failed to start global screenshot hotkey helper: ${message}`);
+      this.scheduleRetry();
+    }
+  }
+
+  private stop(): void {
+    ++this.generation;
+    const child = this.child;
+    this.child = undefined;
+    if (child && !child.killed) child.kill();
+  }
+
+  private clearRetry(): void {
+    if (!this.retryTimer) return;
+    clearTimeout(this.retryTimer);
+    this.retryTimer = undefined;
+  }
+
+  private scheduleRetry(): void {
+    if (this.disposed || process.platform !== 'win32' || this.retryTimer) return;
+
+    const delayMs = this.retryDelayMs;
+    this.retryDelayMs = Math.min(this.retryDelayMs * 2, MAX_RETRY_DELAY_MS);
+    this.retryTimer = setTimeout(() => {
+      this.retryTimer = undefined;
+      this.start();
+    }, delayMs);
+    this.retryTimer.unref?.();
+    this.log(`Retrying global screenshot hotkey registration after ${delayMs}ms`);
+  }
+
+  private handleLine(line: string): void {
+    if (!line) return;
+    if (line === 'TRIGGER') {
+      this.onTrigger();
+      return;
+    }
+    if (line === 'READY') {
+      this.retryDelayMs = INITIAL_RETRY_DELAY_MS;
+      this.log('Global screenshot hotkey registered: Ctrl+Alt+S');
+      return;
+    }
+    if (line === 'UNSUPPORTED') return;
+    if (line.startsWith('ERROR ')) {
+      this.log(`Global screenshot hotkey unavailable: ${line.slice('ERROR '.length)}`);
+    }
+  }
+}