diff --git a/backend/cp_run.py b/backend/cp_run.py
index c69c95b..1b8bd72 100644
--- a/backend/cp_run.py
+++ b/backend/cp_run.py
@@ -3,15 +3,10 @@ from cellpose.io import imread, save_masks
 from PIL import Image
 import numpy as np
 import os, datetime
-from typing import Literal
-
-from sympy import false
+import time
 
 
 class Cprun:
-    # def __init__(self, model: str | Literal["cpsam"], images: list[str] | str):
-    #     self.model = model
-    #     self.images = images
 
     @classmethod
     def run_test(cls):
@@ -26,7 +21,7 @@ class Cprun:
                 f"[{i}] mask max={int(getattr(m, 'max', lambda: 0)()) if hasattr(m, 'max') else int(np.max(m))}, unique={np.unique(m)[:5]} ..."
             )
 
-        ts = datetime.datetime.now().strftime("%Y-%m-%d-%H-%M-%S")
+        ts = datetime.datetime.now().strftime("%Y-%m-%d-%H-%M-%S") + f"-{int(time.time()*1000)%1000:03d}"
         outdir = os.path.join(os.path.dirname(__file__), "test_output", ts)
         os.makedirs(outdir, exist_ok=True)  # 自动创建目录
         for img, mask, flow, name in zip(imgs, masks, flows, files):
@@ -43,8 +38,8 @@ class Cprun:
     @classmethod
     async def run(cls,
                   images: list[str] | str | None = None,
-                  time: datetime.datetime | None = None,
-                  model: str | str = "cpsam",
+                  time: str | None = None,
+                  model: str = "cpsam",
                   diameter: float | None = None,
                   flow_threshold: float | float = 0.4,
                   cellprob_threshold: float | float = 0.0, ):
@@ -67,8 +62,8 @@ class Cprun:
             diameter=diameter
         )
 
-        ts = datetime.datetime.now().strftime("%Y-%m-%d-%H-%M-%S")
-        outdir = os.path.join(os.path.dirname(__file__), "run_output", ts)
+        ts = time
+        outdir = os.path.join(os.path.dirname(__file__), "output", ts)
         os.makedirs(outdir, exist_ok=True)  # 自动创建目录
         for img, mask, flow, name in zip(imgs, masks, flows, files):
             base = os.path.join(outdir, os.path.splitext(os.path.basename(name))[0])
@@ -82,4 +77,5 @@ class Cprun:
             Image.fromarray(over).save(base + "_overlay.png")
 
         message.append(f"Output saved to: {outdir}")
-        return [True, message]
\ No newline at end of file
+        message.append(outdir)
+        return [True, message]
diff --git a/backend/flaskApp.py b/backend/flaskApp.py
index 5f1dc7e..73c5856 100644
--- a/backend/flaskApp.py
+++ b/backend/flaskApp.py
@@ -1,39 +1,74 @@
+import asyncio
+from concurrent.futures import ThreadPoolExecutor
 from flask import Flask, send_from_directory, request, jsonify
-import os, shutil, time, threading, datetime
+import os, shutil, time, threading, datetime, json, redis
 from werkzeug.utils import secure_filename
 from flask_cors import CORS
 from pathlib import Path
+from cp_run import Cprun
 
 app = Flask(__name__)
 CORS(app)
 BASE_DIR = Path(__file__).resolve().parent
 UPLOAD_DIR = BASE_DIR / "uploads"
 os.makedirs(UPLOAD_DIR, exist_ok=True)
+executor = ThreadPoolExecutor(max_workers=4)
+TASKS = {}
+r = redis.Redis(host="127.0.0.1", port=6379, db=0)
 
-def run_flask():
+# 启动测试服务器
+def run_dev():
     app.run(host="10.147.18.141", port=5000)
 
+def set_status(task_id, status, **extra):
+    payload = {"status": status, "updated_at": datetime.datetime.utcnow().isoformat(), **extra}
+    r.set(f"task:{task_id}", json.dumps(payload), ex=86400)  # 1 天过期
+
+def get_status(task_id):
+    raw = r.get(f"task:{task_id}")
+    return json.loads(raw) if raw else None
+
 @app.route("/")
 def index():
     return "<h1>Hello</h1><p>This is the backend of our cellpose server, please visit our website.</p>"
 
-@app.route("/testdl")
+@app.get("/testdl")
 def test_download():
     return send_from_directory("test_output/2025-09-16-20-03-51", "img_overlay.png", as_attachment=True)
 
-@app.route("/dl/<timestamp>")
+@app.get("/dl/<timestamp>")
 def download(timestamp):
-    input_dir = os.path.join("output", timestamp)
-    output_dir = os.path.join("output/tmp", timestamp)  # 不要加 .zip，make_archive 会自动加
-    os.makedirs("output/tmp", exist_ok=True)  # 确保 tmp 存在
+    input_dir = os.path.join(BASE_DIR, "output", timestamp)
+    output_dir = os.path.join(BASE_DIR, "output/tmp", timestamp)  # 不要加 .zip，make_archive 会自动加
+    os.makedirs(BASE_DIR / "output/tmp", exist_ok=True)  # 确保 tmp 存在
     shutil.make_archive(output_dir, 'zip', input_dir)
     print(f"压缩完成: {output_dir}.zip")
     return send_from_directory("output/tmp", f"{timestamp}.zip", as_attachment=True)
 
-
 @app.post("/upload")
 def upload():
-    ts = datetime.datetime.now().strftime("%Y-%m-%d-%H-%M-%S")
+    """
+    接收上传的文件，并将其发送给cellpose。
+    :return:
+    """
+
+    # 从请求中获取参数，若没有则设定为默认值
+    model = request.args.get("model") or request.form.get("model") or "cpsam"
+
+    def _to_float(x, default):
+        try:
+            return float(x)
+        except (TypeError, ValueError):
+            return default
+
+    flow_threshold = _to_float(request.args.get("flow_threshold") or request.form.get("flow_threshold"), 0.4)
+    cellprob_threshold = _to_float(request.args.get("cellprob_threshold") or request.form.get("cellprob_threshold"),
+                                   0.0)
+    diameter_raw = request.args.get("diameter") or request.form.get("diameter")
+    diameter = _to_float(diameter_raw, None) if diameter_raw not in (None, "") else None
+
+    # 将文件保存在本地目录中
+    ts = datetime.datetime.now().strftime("%Y-%m-%d-%H-%M-%S") + f"-{int(time.time()*1000)%1000:03d}"
     os.makedirs(UPLOAD_DIR / ts, exist_ok=True)
     files = request.files.getlist("files")
     saved = []
@@ -42,5 +77,41 @@ def upload():
             continue
         name = secure_filename(f.filename)
         f.save(os.path.join(UPLOAD_DIR / ts, name))
-        saved.append(name)
-    return jsonify({"ok": True, "count": len(saved), "files": saved, "id": ts})
\ No newline at end of file
+        saved.append(os.path.join(UPLOAD_DIR, ts, name))
+
+    # 新建一个线程，防止返回被阻塞
+    def job():
+        return asyncio.run(Cprun.run(
+            images=saved, model=model,
+            cellprob_threshold=cellprob_threshold,
+            flow_threshold=flow_threshold,
+            diameter=diameter, time=ts
+        ))
+
+    # 将线程状态存入redis
+    set_status(ts, "running")
+    fut = executor.submit(job)
+
+    def done_cb(f):
+        try:
+            f.result()
+            set_status(ts, "success")
+        except Exception as e:
+            set_status(ts, "failed", error=str(e))
+
+    fut.add_done_callback(done_cb)
+
+    return jsonify({"ok": True, "count": len(saved), "id": ts})
+
+@app.get("/status/")
+def status():
+    """
+    检查某一cellpose任务是否完成
+
+    :return:
+    """
+    task_id = request.args.get('id')
+    st = get_status(task_id)
+    if not st:
+        return jsonify({"ok": True, "exists": False, "status": "not_found"}), 200
+    return jsonify({"ok": True, "exists": True, **st}), 200
diff --git a/backend/main.py b/backend/main.py
index f6ff9fa..be2bcba 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -1,10 +1,10 @@
 from cp_run import Cprun
-from flaskApp import run_flask
+from flaskApp import run_dev
 from multiprocessing import Process
 
 
 if __name__ == "__main__":
     # Cprun.run_test()
-    p = Process(target=run_flask)
+    p = Process(target=run_dev)
     p.start()
     print(f"Flask running in PID {p.pid}")
\ No newline at end of file
diff --git a/frontend/preview.html b/frontend/preview.html
index d60ced9..6278803 100644
--- a/frontend/preview.html
+++ b/frontend/preview.html
@@ -1,3 +1,37 @@
 <!DOCTYPE html>
-<meta charset="UTF-8">
-<h1>This is preview</h1>
\ No newline at end of file
+<meta charset="UTF-8" />
+<h1>This is preview</h1>
+<p id="none-exist" hidden>id not exists</p>
+
+<script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script>
+<script type="module">
+  const API_BASE = "http://10.147.18.141:5000/status/";
+  const params = new URLSearchParams(window.location.search);
+  const ID = params.get("id");
+
+  const msg = document.getElementById("none-exist");
+
+  // 没有 id，直接提示
+  if (!ID) {
+    msg.textContent = "missing id in URL";
+    msg.hidden = false;
+  } else {
+    try {
+      const res = await axios.get(API_BASE + "?id=" + encodeURIComponent(ID));
+      const { exists, status } = res.data; // exists: boolean, status: "running" | "success" | "failed"...
+
+      // 只在“不存在”时显示这条消息
+      if (!exists) {
+        msg.textContent = `id "${ID}" not exists`;
+        msg.hidden = false;
+      } else {
+        msg.hidden = true; // 存在就隐藏这条“not exists”的提示
+        
+      }
+    } catch (e) {
+      msg.textContent = "request failed";
+      msg.hidden = false;
+      console.error(e);
+    }
+  }
+</script>
diff --git a/backend/requirements.txt b/requirements.txt
similarity index 60%
rename from backend/requirements.txt
rename to requirements.txt
index 3ddb55f..f94249a 100644
--- a/backend/requirements.txt
+++ b/requirements.txt
@@ -2,5 +2,7 @@ numpy~=2.1.2
 cellpose~=4.0.6
 pillow~=11.0.0
 sympy~=1.13.3
+redis~=6.4.0
 flask~=3.1.2
-werkzeug~=3.1.3
\ No newline at end of file
+werkzeug~=3.1.3
+flask-cors~=6.0.1
\ No newline at end of file