diff --git a/gradio_ui.py b/gradio_ui.py
index c746740..09dd7c0 100644
--- a/gradio_ui.py
+++ b/gradio_ui.py
@@ -2,7 +2,12 @@ import time
 import gradio as gr
 import subprocess
 
+# 全局变量：当前子进程
+current_process = None
+
+# 启动 evalscope 的逻辑（支持 yield 输出）
 def run_eval(inputs, native, other, outputs, api_url, api_token):
+    global current_process
     timestamp = time.strftime("%Y%m%d-%H%M%S")
     command = [
         "evalscope", "perf",
@@ -20,21 +25,43 @@ def run_eval(inputs, native, other, outputs, api_url, api_token):
 
     full_output = f"[Eval Started @ {timestamp}]\n"
     yield full_output
+
     try:
-        process = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, text=True, bufsize=1)
-        for line in process.stdout:
+        current_process = subprocess.Popen(
+            command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, text=True, bufsize=1
+        )
+        for line in current_process.stdout:
             full_output += line
-            yield full_output  # ✅ 每次 yield 累积的完整内容
-        process.stdout.close()
-        process.wait()
+            yield full_output
+        current_process.stdout.close()
+        current_process.wait()
     except Exception as e:
         full_output += f"[Error] {str(e)}\n"
         yield full_output
+    finally:
+        current_process = None
+
     full_output += "[Eval Finished]\n"
     yield full_output
 
+# 停止当前 evalscope 子进程
+def stop_eval():
+    global current_process
+    if current_process and current_process.poll() is None:
+        current_process.terminate()
+        current_process = None
+        return "[Stopped by user]\n"
+    return "[No active process]\n"
 
+# 按钮行为切换函数：Run / Stop
+def toggle_run(inputs, native, other, outputs, api_url, api_token, is_running):
+    if not is_running:
+        return run_eval(inputs, native, other, outputs, api_url, api_token), True, gr.update(value="Stop Evaluation")
+    else:
+        msg = stop_eval()
+        return msg, False, gr.update(value="Run Evaluation")
 
+# 控制输入选项互斥逻辑
 def enforce_input_exclusive_and_toggle_fields(selected):
     group1 = {"API Models", "Local Models"}
     group2 = {"Benchmarks", "Custom Datasets"}
@@ -57,7 +84,9 @@ def enforce_input_exclusive_and_toggle_fields(selected):
         gr.Row.update(visible=show_api_fields)
     )
 
+# 构建 Gradio 界面
 with gr.Blocks(title="EvalScope 全功能界面") as demo:
+    is_running = gr.State(value=False)  # 当前运行状态
     with gr.Group():
         with gr.Row():
             input_choices = gr.CheckboxGroup(
@@ -99,9 +128,9 @@ with gr.Blocks(title="EvalScope 全功能界面") as demo:
     )
 
     run_button.click(
-        fn=run_eval,
-        inputs=[input_choices, native_choices, other_choices, output_choices, api_url_input, api_token_input],
-        outputs=output_text,
+        fn=toggle_run,
+        inputs=[input_choices, native_choices, other_choices, output_choices, api_url_input, api_token_input, is_running],
+        outputs=[output_text, is_running, run_button],
         show_progress=True
     )