diff --git a/README.md b/README.md
index 070848a..3a741df 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,7 @@
 - 支持URL和Base64图像响应格式
 - 完整的错误处理机制
 - 同时输出图像和图片URL链接
+- 自动保存图片到本地文件，支持自定义文件名前缀
 
 ## 安装
 
@@ -46,6 +47,7 @@ pip install -r requirements.txt
 - **guidance_scale**: 文本描述的影响程度（默认：2.5，范围：1.0-10.0）
 - **aspect_ratio**: 图像宽高比，支持1.5K分辨率预设（默认：1:1）
 - **return_url**: 是否返回图片URL链接（默认：True）
+- **filename_prefix**: 本地保存文件名前缀（默认：seedream）
 
 ### 支持的图像分辨率 (1.5K)
 
@@ -83,6 +85,7 @@ pip install -r requirements.txt
 | guidance_scale | scale | 引导强度 |
 | aspect_ratio | width/height | 自动设置宽高比 |
 | return_url | return_url | 返回图片URL |
+| filename_prefix | - | 本地文件名前缀 |
 
 ## 节点位置
 
@@ -112,6 +115,8 @@ pip install -r requirements.txt
 - 请合理使用API避免超出配额限制
 - 网络环境需要能够访问火山引擎API服务
 - image_url输出可以用于后续的图像处理或保存链接
+- 生成的图片会自动保存到`output`目录下，文件名格式为`{filename_prefix}_0001.png`
+- 如果文件名重复，序号会自动递增（如：`seedream_0002.png`）
 
 ## 技术支持
 
diff --git a/nodes/volcengine_seedream_v3.py b/nodes/volcengine_seedream_v3.py
index 8b144a1..087845a 100644
--- a/nodes/volcengine_seedream_v3.py
+++ b/nodes/volcengine_seedream_v3.py
@@ -37,6 +37,7 @@ class VolcengineSeeDreamV3Node:
                 "guidance_scale": ("FLOAT", {"default": 2.5, "min": 1.0, "max": 10.0, "step": 0.1}),
                 "aspect_ratio": (["1:1", "4:3", "3:2", "16:9", "9:16", "21:9"], {"default": "1:1"}),
                 "return_url": ("BOOLEAN", {"default": True}),
+                "filename_prefix": ("STRING", {"default": "seedream", "multiline": False}),
             }
         }
     
@@ -180,8 +181,42 @@ class VolcengineSeeDreamV3Node:
         }
         return resolution_map.get(aspect_ratio, (1536, 1536))
     
+    def get_unique_filename(self, prefix, output_dir="output", extension="png"):
+        """Generate unique filename with auto-incrementing number"""
+        if not os.path.exists(output_dir):
+            os.makedirs(output_dir)
+        
+        counter = 1
+        while True:
+            filename = f"{prefix}_{counter:04d}.{extension}"
+            filepath = os.path.join(output_dir, filename)
+            if not os.path.exists(filepath):
+                return filepath, filename
+            counter += 1
+    
+    def save_image_from_tensor(self, image_tensor, filename_prefix):
+        """Save image tensor to local file and return filepath"""
+        try:
+            # Convert tensor back to PIL Image
+            image_array = image_tensor.squeeze(0).cpu().numpy()
+            image_array = (image_array * 255).astype(np.uint8)
+            image = Image.fromarray(image_array)
+            
+            # Get unique filename
+            filepath, filename = self.get_unique_filename(filename_prefix)
+            
+            # Save image
+            image.save(filepath)
+            print(f"Image saved to: {filepath}")
+            
+            return filepath
+            
+        except Exception as e:
+            print(f"Failed to save image: {str(e)}")
+            return ""
+    
     def generate_image(self, access_key, secret_key, prompt, use_pre_llm=False, 
-                      seed=-1, guidance_scale=2.5, aspect_ratio="1:1", return_url=True):
+                      seed=-1, guidance_scale=2.5, aspect_ratio="1:1", return_url=True, filename_prefix="seedream"):
         """
         Generate image using Volcengine SeeDream V3 API
         """
@@ -265,7 +300,11 @@ class VolcengineSeeDreamV3Node:
             else:
                 raise Exception("No valid image data found in API response")
             
+            # Save image to local file
+            saved_filepath = self.save_image_from_tensor(image_tensor, filename_prefix)
+            
             print("Image generated successfully!")
+            print(f"Image saved as: {saved_filepath}")
             return (image_tensor, image_url)
             
         except Exception as e: