diff --git a/astrbot/core/utils/astrbot_path.py b/astrbot/core/utils/astrbot_path.py
index e879e9c2b..9f5e711ca 100644
--- a/astrbot/core/utils/astrbot_path.py
+++ b/astrbot/core/utils/astrbot_path.py
@@ -96,7 +96,7 @@ class AstrbotPaths:
     """Astrbot 项目路径管理类"""
 
     def __init__(self) -> None:
-        self._root = self._resolve_root()
+        self._root_override: Path | None = None
 
     def _resolve_root(self) -> Path:
         if path := os.environ.get("ASTRBOT_ROOT"):
@@ -108,11 +108,13 @@ class AstrbotPaths:
 
     @property
     def root(self) -> Path:
-        return self._root
+        if self._root_override is not None:
+            return self._root_override
+        return self._resolve_root()
 
     @root.setter
     def root(self, value: Path) -> None:
-        self._root = value
+        self._root_override = value
 
     @property
     def project_root(self) -> Path:
diff --git a/tests/test_astrbot_paths.py b/tests/test_astrbot_paths.py
new file mode 100644
index 000000000..583f1e064
--- /dev/null
+++ b/tests/test_astrbot_paths.py
@@ -0,0 +1,33 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+from astrbot.core.utils.astrbot_path import AstrbotPaths
+
+
+def test_astrbot_paths_root_tracks_environment_updates(monkeypatch, tmp_path: Path):
+    first_root = tmp_path / "first-root"
+    second_root = tmp_path / "second-root"
+
+    monkeypatch.setenv("ASTRBOT_ROOT", str(first_root))
+    paths = AstrbotPaths()
+
+    assert paths.root == first_root
+    assert paths.skills == first_root / "data" / "skills"
+
+    monkeypatch.setenv("ASTRBOT_ROOT", str(second_root))
+
+    assert paths.root == second_root
+    assert paths.skills == second_root / "data" / "skills"
+
+
+def test_astrbot_paths_root_override_remains_explicit(monkeypatch, tmp_path: Path):
+    monkeypatch.delenv("ASTRBOT_ROOT", raising=False)
+    paths = AstrbotPaths()
+    override_root = tmp_path / "override-root"
+
+    paths.root = override_root
+    monkeypatch.setenv("ASTRBOT_ROOT", str(tmp_path / "env-root"))
+
+    assert paths.root == override_root
+    assert paths.skills == override_root / "data" / "skills"