diff --git a/detection/app.py b/detection/app.py
index 8313ca4..71e243c 100755
--- a/detection/app.py
+++ b/detection/app.py
@@ -14,6 +14,7 @@ import json
 from qr_verify_Tool.affinity import roi_affinity_siml
 from qr_verify_Tool.roi_img_process import *
 from qr_verify_Tool.models import *
+from utils import get_model
 
 app = Flask(__name__)
 # os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"
@@ -21,13 +22,13 @@ app = Flask(__name__)
 from matplotlib.ticker import NullLocator
 device = os.environ.get("CUDA_DEVICE", "cpu")
 
-qr_box_detect_now = qr_box_detect.QR_Box_detect(model_path='model/qr_cloud_detect_20230928.pt', device=device)
-qr_roi_detect_now = qr_box_detect.QR_Box_detect(model_path='model/qr_roi_cloud_detect_20230928.pt', device=device)
+qr_box_detect_now = qr_box_detect.QR_Box_detect(model_path=get_model('qr_cloud_detect_20230928.pt'), device=device)
+qr_roi_detect_now = qr_box_detect.QR_Box_detect(model_path=get_model('qr_roi_cloud_detect_20230928.pt'), device=device)
 
 from thirdTool import qrsrgan
-dot_realesrgan = qrsrgan.RealsrGan(model_path='model/net_g_2000.pth', device=device)
+dot_realesrgan = qrsrgan.RealsrGan(model_path=get_model('net_g_2000.pth'), device=device)
 roi_generator = GeneratorUNet()
-roi_generator.load_state_dict(torch.load("model/roi_net_g_20240306.pth", map_location=torch.device('cpu')))
+roi_generator.load_state_dict(torch.load(get_model("roi_net_g_20240306.pth"), map_location=torch.device('cpu')))
 
 @app.route('/upload', methods=['POST', 'GET'])
 def upload():
diff --git a/detection/requirements.txt b/detection/requirements.txt
index 5e3a482..a304291 100644
--- a/detection/requirements.txt
+++ b/detection/requirements.txt
@@ -6,3 +6,4 @@ opencv-python==4.5.5.62
 timm==0.9.2
 pandas
 seaborn
+oss2
diff --git a/detection/utils.py b/detection/utils.py
new file mode 100644
index 0000000..c5c5fa6
--- /dev/null
+++ b/detection/utils.py
@@ -0,0 +1,25 @@
+import os
+import oss2
+
+def get_model(name):
+    fn = os.path.join(os.path.dirname(__file__), "model", name)
+    if os.path.exists(fn):
+        return fn
+    with open(fn + ".tmp", 'wb') as tf:
+        tf.write(oss_get(name, "emblem-models"))
+    os.rename(fn + ".tmp", fn)
+    return fn
+
+def oss_get(name, bucket=None):
+    try:
+        return oss_bucket(bucket).get_object(name).read()
+    except oss2.exceptions.NoSuchKey:
+        return None
+
+def oss_bucket(bucketname):
+    auth = oss2.Auth('LTAI5tC2qXGxwHZUZP7DoD1A', 'qPo9O6ZvEfqo4t8oflGEm0DoxLHJhm')
+    bucket = oss2.Bucket(auth, 'oss-rg-china-mainland.aliyuncs.com', bucketname)
+    return bucket
+
+if __name__ == "__main__":
+    print(get_model('sr.prototxt'))