diff --git a/src/cli/blackboard.py b/src/cli/blackboard.py
index 343285e..8c1aa9d 100644
--- a/src/cli/blackboard.py
+++ b/src/cli/blackboard.py
@@ -15,12 +15,26 @@ from src.blackboard.registry import ProjectRegistry
 
 
 def _find_project_root() -> Path:
-    """从环境变量或默认路径找项目根目录"""
+    """从环境变量、配置文件或默认路径找项目根目录"""
     import os
+    # 1. 环境变量最高优先级
     root = os.environ.get("BLACKBOARD_ROOT")
     if root:
         return Path(root)
-    return Path.home() / ".sanguo_projects" / "sanguo_moziplus_v2" / "projects"
+    # 2. 从 config/default.yaml 读取
+    try:
+        import yaml
+        config_path = Path(__file__).parent.parent / "config" / "default.yaml"
+        if config_path.exists():
+            with open(config_path) as f:
+                cfg = yaml.safe_load(f) or {}
+            data_root = cfg.get("data_root")
+            if data_root:
+                return Path(data_root).expanduser()
+    except Exception:
+        pass
+    # 3. 相对于源码目录的 data/
+    return Path(__file__).parent.parent / "data"
 
 
 def _get_bb(project_id: str) -> Blackboard:
diff --git a/src/utils.py b/src/utils.py
new file mode 100644
index 0000000..9c3dac7
--- /dev/null
+++ b/src/utils.py
@@ -0,0 +1,37 @@
+"""路径解析工具 — 统一获取项目数据根目录
+
+优先级：
+1. BLACKBOARD_ROOT 环境变量
+2. config/default.yaml 的 data_root
+3. 相对于源码目录的 data/
+"""
+
+from __future__ import annotations
+
+import os
+from pathlib import Path
+from typing import Optional
+
+
+def get_data_root() -> Path:
+    """获取项目数据根目录"""
+    # 1. 环境变量最高优先级
+    root = os.environ.get("BLACKBOARD_ROOT")
+    if root:
+        return Path(root)
+
+    # 2. 从 config/default.yaml 读取
+    try:
+        import yaml
+        config_path = Path(__file__).parent.parent / "config" / "default.yaml"
+        if config_path.exists():
+            with open(config_path) as f:
+                cfg = yaml.safe_load(f) or {}
+            data_root = cfg.get("data_root")
+            if data_root:
+                return Path(data_root).expanduser()
+    except Exception:
+        pass
+
+    # 3. 相对于源码目录的 data/
+    return Path(__file__).parent.parent / "data"