diff --git a/metagpt/tools/libs/sd_engine.py b/metagpt/tools/libs/sd_engine.py
index 47b0da7e9..7001eadf5 100644
--- a/metagpt/tools/libs/sd_engine.py
+++ b/metagpt/tools/libs/sd_engine.py
@@ -13,7 +13,8 @@ import requests
 from aiohttp import ClientSession
 from PIL import Image, PngImagePlugin
 
-from metagpt.const import SD_OUTPUT_FILE_REPO
+#
+from metagpt.const import SD_OUTPUT_FILE_REPO, SOURCE_ROOT
 from metagpt.logs import logger
 from metagpt.tools.tool_data_type import ToolTypeEnum
 from metagpt.tools.tool_registry import register_tool
@@ -55,11 +56,9 @@ default_negative_prompt = "(easynegative:0.8),black, dark,Low resolution"
 @register_tool(tool_type=ToolTypeEnum.STABLE_DIFFUSION.value)
 class SDEngine:
     def __init__(self, sd_url=""):
-        from metagpt.config2 import config
-
         # Initialize the SDEngine with configuration
-        self.sd_url = sd_url if sd_url else config.get("SD_URL")
-        self.sd_t2i_url = f"{self.sd_url}{config.get('SD_T2I_API')}"
+        self.sd_url = sd_url
+        self.sd_t2i_url = f"{self.sd_url}/sdapi/v1/txt2img"
         # Define default payload settings for SD API
         self.payload = payload
         logger.info(self.sd_t2i_url)
@@ -82,7 +81,7 @@ class SDEngine:
         return self.payload
 
     def save(self, imgs, save_name=""):
-        save_dir = config.workspace_path / SD_OUTPUT_FILE_REPO
+        save_dir = SOURCE_ROOT / SD_OUTPUT_FILE_REPO
         if not save_dir.exists():
             save_dir.mkdir(parents=True, exist_ok=True)
         batch_decode_base64_to_image(imgs, str(save_dir), save_name=save_name)
@@ -113,17 +112,10 @@ class SDEngine:
 
         rsp_json = json.loads(data)
         imgs = rsp_json["images"]
+
         logger.info(f"callback rsp json is {rsp_json.keys()}")
         return imgs
 
-    async def run_i2i(self):
-        # todo: 添加图生图接口调用
-        raise NotImplementedError
-
-    async def run_sam(self):
-        # todo：添加SAM接口调用
-        raise NotImplementedError
-
 
 def decode_base64_to_image(img, save_name):
     image = Image.open(io.BytesIO(base64.b64decode(img.split(",", 1)[0])))
diff --git a/requirements.txt b/requirements.txt
index 66b3c9fc0..dff615bdc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -65,4 +65,4 @@ networkx~=3.2.1
 google-generativeai==0.3.2
 # playwright==1.40.0  # playwright extras require
 anytree
-ipywidgets==8.1.1
+ipywidgets==8.1.1
\ No newline at end of file
diff --git a/tests/metagpt/tools/libs/test_sd_engine.py b/tests/metagpt/tools/libs/test_sd_engine.py
index 363cf96b9..e2c46e72a 100644
--- a/tests/metagpt/tools/libs/test_sd_engine.py
+++ b/tests/metagpt/tools/libs/test_sd_engine.py
@@ -2,28 +2,59 @@
 # @Date    : 1/10/2024 10:07 PM
 # @Author  : stellahong (stellahong@fuzhi.ai)
 # @Desc    :
+import base64
+import io
+import json
+
 import pytest
+from PIL import Image, ImageDraw
 
 from metagpt.tools.libs.sd_engine import SDEngine
 
 
-def test_sd_tools():
-    engine = SDEngine()
+def generate_mock_image_data():
+    # 创建一个简单的图片对象
+    image = Image.new("RGB", (100, 100), color="white")
+    draw = ImageDraw.Draw(image)
+    draw.text((10, 10), "Mock Image", fill="black")
+
+    # 将图片转换为二进制数据
+    with io.BytesIO() as buffer:
+        image.save(buffer, format="PNG")
+        image_binary = buffer.getvalue()
+
+    # 对图片二进制数据进行 base64 编码
+    image_base64 = base64.b64encode(image_binary).decode("utf-8")
+
+    return image_base64
+
+
+def test_sd_tools(mocker):
+    mock_response = mocker.MagicMock()
+    mock_response.json.return_value = {"images": [generate_mock_image_data()]}
+    mocker.patch("requests.Session.post", return_value=mock_response)
+
+    engine = SDEngine(sd_url="http://example_localhost:7860")
     prompt = "1boy,  hansom"
     engine.construct_payload(prompt)
     engine.simple_run_t2i(engine.payload)
 
 
 def test_sd_construct_payload():
-    engine = SDEngine()
+    engine = SDEngine(sd_url="http://example_localhost:7860")
     prompt = "1boy,  hansom"
     engine.construct_payload(prompt)
     assert "negative_prompt" in engine.payload
 
 
 @pytest.mark.asyncio
-async def test_sd_asyn_t2i():
-    engine = SDEngine()
+async def test_sd_asyn_t2i(mocker):
+    mock_post = mocker.patch("aiohttp.ClientSession.post")
+    mock_response = mocker.AsyncMock()
+    mock_response.read.return_value = json.dumps({"images": [generate_mock_image_data()]})
+    mock_post.return_value.__aenter__.return_value = mock_response
+
+    engine = SDEngine(sd_url="http://example_localhost:7860")
     prompt = "1boy,  hansom"
     engine.construct_payload(prompt)
     await engine.run_t2i([engine.payload])