diff --git a/tools/get_flops.py b/tools/get_flops.py
index 6c9cb23400c..502d57651c0 100644
--- a/tools/get_flops.py
+++ b/tools/get_flops.py
@@ -1,11 +1,11 @@
 import argparse
+import json
 
 from mmcv import Config
 
 from mmdet.models import build_detector
 from mmdet.utils import get_model_complexity_info
 
-
 def parse_args():
     parser = argparse.ArgumentParser(description='Train a detector')
     parser.add_argument('config', help='train config file path')
@@ -15,6 +15,7 @@ def parse_args():
         nargs='+',
         default=[1280, 800],
         help='input image size')
+    parser.add_argument('--out')
     args = parser.parse_args()
     return args
 
@@ -50,6 +51,14 @@ def main():
           'You may need to check if all ops are supported and verify that the '
           'flops computation is correct.')
 
+    if args.out:
+        out = list()
+        out.append({'key': 'size', 'displayName': 'Size', 'value': float(params.split(' ')[0]), 'unit': 'Mp'})
+        out.append({'key': 'complexity', 'displayName': 'Complexity', 'value': 2 * float(flops.split(' ')[0]),
+                    'unit': 'GFLOPs'})
+        with open(args.out, 'w') as write_file:
+            json.dump(out, write_file, indent=4)
+
 
 if __name__ == '__main__':
     main()