diff --git a/test_onnx.py b/test_onnx.py
new file mode 100644
index 0000000..a1a5684
--- /dev/null
+++ b/test_onnx.py
@@ -0,0 +1,110 @@
+from towhee import ops
+from timm_image import TimmImage
+import onnx
+
+f = open('onnx.csv', 'a+')
+f.write('model_name, run_op, save_onnx, check_onnx\n')
+
+# models = TimmImage.supported_model_names()[:1]
+models = [
+    # 'vgg11',
+    'resnet18',
+    # 'resnetv2_50',
+    # 'seresnet33ts',
+    # 'skresnet18',
+    # 'resnext26ts',
+    # 'seresnext26d_32x4d',
+    # 'skresnext50_32x4d',
+    # 'convit_base',
+    # 'inception_v4',
+    # 'efficientnet_b0',
+    'tf_efficientnet_b0',
+    # 'swin_base_patch4_window7_224',
+    # 'vit_base_patch8_224',
+    # 'beit_base_patch16_224',
+    # 'convnext_base',
+    # 'crossvit_9_240',
+    # 'convmixer_768_32',
+    # 'coat_lite_mini',
+    # 'inception_v3',
+    # 'cait_m36_384',
+    # 'cspdarknet53',
+    # 'deit_base_distilled_patch16_224',
+    # 'densenet121',
+    # 'dla34',
+    # 'dm_nfnet_f0',
+    # 'nf_regnet_b1',
+    # 'nf_resnet50',
+    # 'dpn68',
+    # 'ese_vovnet19b_dw',
+    # 'fbnetc_100',
+    # 'fbnetv3_b',
+    # 'halonet26t',
+    # 'eca_halonext26ts',
+    # 'sehalonet33ts',
+    # 'hardcorenas_a',
+    # 'hrnet_w18',
+    # 'jx_nest_base',
+    # 'lcnet_050',
+    # 'levit_128',
+    # 'mixer_b16_224',
+    # 'mixnet_s',
+    # 'mnasnet_100',
+    # 'mobilenetv2_050',
+    # 'mobilenetv3_large_100',
+    # 'nasnetalarge',
+    # 'pit_b_224',
+    # 'pnasnet5large',
+    # 'regnetx_002',
+    # 'repvgg_a2',
+    # 'res2net50_14w_8s',
+    # 'res2next50',
+    # 'resmlp_12_224',
+    # 'resnest14d',
+    # 'rexnet_100',
+    # 'selecsls42b',
+    # 'semnasnet_075',
+    # 'tinynet_a',
+    # 'tnt_s_patch16_224',
+    # 'tresnet_l',
+    # 'twins_pcpvt_base',
+    # 'visformer_small',
+    # 'xception',
+    # 'xcit_large_24_p8_224',
+    # 'ghostnet_100',
+    # 'gmlp_s16_224',
+    # 'lambda_resnet26rpt_256',
+    # 'spnasnet_100',
+]
+
+decoder = ops.image_decode()
+data = decoder('./towhee.jpeg')
+
+for name in models:
+    f.write(f'{name},')
+    try:
+        op = TimmImage(model_name=name)
+        out1 = op(data)
+        f.write('success,')
+    except Exception as e:
+        f.write('fail')
+        print(f'Fail to load op for {name}: {e}')
+        continue
+    try:
+        op.save_model(format='onnx')
+        f.write('success,')
+    except Exception as e:
+        f.write('fail')
+        print(f'Fail to save onnx for {name}: {e}')
+        continue
+    try:
+        saved_name = name.replace('/', '-')
+        onnx_model = onnx.load(f'saved/onnx/{saved_name}.onnx')
+        onnx.checker.check_model(onnx_model)
+        f.write('success')
+    except Exception as e:
+        f.write('fail')
+        print(f'Fail to check onnx for {name}: {e}')
+        continue
+    f.write('\n')
+print('Finished.')
diff --git a/test_torchscript.py b/test_torchscript.py
new file mode 100644
index 0000000..2461a4f
--- /dev/null
+++ b/test_torchscript.py
@@ -0,0 +1,111 @@
+from towhee import ops
+from timm_image import TimmImage
+import torch
+
+f = open('torchscript.csv', 'a+')
+f.write('model_name,run_op,save_torchscript,check_result\n')
+
+# models = TimmImage.supported_model_names()[:1]
+models = [
+    # 'vgg11',
+    'resnet18',
+    # 'resnetv2_50',
+    # 'seresnet33ts',
+    # 'skresnet18',
+    # 'resnext26ts',
+    # 'seresnext26d_32x4d',
+    # 'skresnext50_32x4d',
+    # 'convit_base',
+    # 'inception_v4',
+    # 'efficientnet_b0',
+    'tf_efficientnet_b0',
+    # 'swin_base_patch4_window7_224',
+    # 'vit_base_patch8_224',
+    # 'beit_base_patch16_224',
+    # 'convnext_base',
+    # 'crossvit_9_240',
+    # 'convmixer_768_32',
+    # 'coat_lite_mini',
+    # 'inception_v3',
+    # 'cait_m36_384',
+    # 'cspdarknet53',
+    # 'deit_base_distilled_patch16_224',
+    # 'densenet121',
+    # 'dla34',
+    # 'dm_nfnet_f0',
+    # 'nf_regnet_b1',
+    # 'nf_resnet50',
+    # 'dpn68',
+    # 'ese_vovnet19b_dw',
+    # 'fbnetc_100',
+    # 'fbnetv3_b',
+    # 'halonet26t',
+    # 'eca_halonext26ts',
+    # 'sehalonet33ts',
+    # 'hardcorenas_a',
+    # 'hrnet_w18',
+    # 'jx_nest_base',
+    # 'lcnet_050',
+    # 'levit_128',
+    # 'mixer_b16_224',
+    # 'mixnet_s',
+    # 'mnasnet_100',
+    # 'mobilenetv2_050',
+    # 'mobilenetv3_large_100',
+    # 'nasnetalarge',
+    # 'pit_b_224',
+    # 'pnasnet5large',
+    # 'regnetx_002',
+    # 'repvgg_a2',
+    # 'res2net50_14w_8s',
+    # 'res2next50',
+    # 'resmlp_12_224',
+    # 'resnest14d',
+    # 'rexnet_100',
+    # 'selecsls42b',
+    # 'semnasnet_075',
+    # 'tinynet_a',
+    # 'tnt_s_patch16_224',
+    # 'tresnet_l',
+    # 'twins_pcpvt_base',
+    # 'visformer_small',
+    # 'xception',
+    # 'xcit_large_24_p8_224',
+    # 'ghostnet_100',
+    # 'gmlp_s16_224',
+    # 'lambda_resnet26rpt_256',
+    # 'spnasnet_100',
+]
+
+decoder = ops.image_decode()
+data = decoder('./towhee.jpeg')
+
+for name in models:
+    f.write(f'{name},')
+    try:
+        op = TimmImage(model_name=name)
+        out1 = op(data)
+        f.write('success,')
+    except Exception as e:
+        f.write('fail')
+        print(f'Fail to load op for {name}: {e}')
+        continue
+    try:
+        op.save_model(format='torchscript')
+        f.write('success,')
+    except Exception as e:
+        f.write('fail')
+        print(f'Fail to save onnx for {name}: {e}')
+        continue
+    try:
+        saved_name = name.replace('/', '-')
+        op.model = torch.jit.load(f'saved/torchscript/{saved_name}.pt')
+        out2 = op(data)
+        assert (out1 == out2).all()
+        f.write('success')
+    except Exception as e:
+        f.write('fail')
+        print(f'Fail to check onnx for {name}: {e}')
+        continue
+    f.write('\n')
+print('Finished.')
diff --git a/timm_image.py b/timm_image.py
index 1b80e55..c7f3843 100644
--- a/timm_image.py
+++ b/timm_image.py
@@ -27,6 +27,7 @@ from torch import nn
 
 from PIL import Image as PILImage
 
+import timm
 from timm.data.transforms_factory import create_transform
 from timm.data import resolve_data_config
 from timm.models.factory import create_model
@@ -57,8 +58,8 @@ class TimmImage(NNOperator):
         self.model = create_model(self.model_name, pretrained=True, num_classes=num_classes)
         self.model.to(self.device)
         self.model.eval()
-        config = resolve_data_config({}, model=self.model)
-        self.tfms = create_transform(**config)
+        self.config = resolve_data_config({}, model=self.model)
+        self.tfms = create_transform(**self.config)
         self.skip_tfms = skip_preprocess
 
     @arg(1, to_image_color('RGB'))
@@ -76,31 +77,56 @@ class TimmImage(NNOperator):
         vec = features.flatten().detach().numpy()
         return vec
 
-    def save_model(self, jit: bool = True, destination: str = 'default'):
-        if destination == 'default':
+    def save_model(self, format: str = 'pytorch', path: str = 'default'):
+        if path == 'default':
             path = str(Path(__file__).parent)
-            destination = os.path.join(path, self.model_name + '.pt')
-        if jit:
+            path = os.path.join(path, 'saved', format)
+            os.makedirs(path, exist_ok=True)
+            name = self.model_name.replace('/', '-')
+            path = os.path.join(path, name)
+        dummy_input = torch.rand((1,) + self.config['input_size'])
+        if format == 'pytorch':
+            path = path + '.pt'
+            torch.save(self.model, path)
+        elif format == 'torchscript':
+            path = path + '.pt'
             try:
-                traced_model = torch.jit.script(self.model)
-                torch.jit.save(traced_model, destination)
+                try:
+                    jit_model = torch.jit.script(self.model)
+                except Exception:
+                    jit_model = torch.jit.trace(self.model, dummy_input, strict=False)
+                torch.jit.save(jit_model, path)
             except Exception as e:
+                log.error(f'Fail to save as torchscript: {e}.')
                 raise RuntimeError(f'Fail to save as torchscript: {e}.')
+        elif format == 'onnx':
+            path = path + '.onnx'
+            try:
+                torch.onnx.export(self.model,
+                                  dummy_input,
+                                  path,
+                                  input_names=["input"],
+                                  output_names=["output"],
+                                  opset_version=12)
+            except Exception as e:
+                log.error(f'Fail to save as onnx: {e}.')
+                raise RuntimeError(f'Fail to save as onnx: {e}.')
+        # todo: elif format == 'tensorrt':
         else:
-            torch.save(self.model, destination)
+            log.error(f'Unsupported format "{format}".')
 
-# if __name__ == '__main__':
-#     from towhee import ops
-#
-#     path = '/image/path/or/link'
-#
-#     decoder = ops.image_decode.cv2()
-#     img = decoder(path)
-#
-#     op = TimmImage('resnet50')
-#     out = op(img)
-#     print(out)
-#
-#     op.model = torch.jit.load('resnet50.pt')
-#     out2 = op(img)
-#     print(out2)
+    @staticmethod
+    def supported_model_names(format: str = None):
+        full_list = timm.list_models(pretrained=True)
+        full_list.sort()
+        if format is None:
+            model_list = full_list
+        elif format == 'pytorch':
+            to_remove = []
+            assert set(to_remove).issubset(set(full_list))
+            model_list = list(set(full_list) - set(to_remove))
+        # todo: elif format == 'torchscript':
+        # todo: elif format == 'tensorrt'
+        else:
+            log.error(f'Invalid format "{format}". Currently supported formats: "pytorch".')
+        return model_list
diff --git a/towhee.jpeg b/towhee.jpeg
new file mode 100644
index 0000000..caf63b3
Binary files /dev/null and b/towhee.jpeg differ