diff --git a/database/db_manager.py b/database/db_manager.py
index 1f71d8c..6043e76 100644
--- a/database/db_manager.py
+++ b/database/db_manager.py
@@ -322,3 +322,34 @@ class DatabaseManager:
                 (project_id,)
             )
             return [ConfigData(*row) for row in cursor.fetchall()]
+
+    def delete_project(self, project_id: int) -> bool:
+        """删除项目及其关联数据"""
+        try:
+            with self.get_connection() as conn:
+                # 使用事务确保数据一致性
+                conn.executescript(f"""
+                    DELETE FROM filters WHERE config_id IN 
+                        (SELECT id FROM configs WHERE project_id = {project_id});
+                    DELETE FROM params WHERE config_id IN 
+                        (SELECT id FROM configs WHERE project_id = {project_id});
+                    DELETE FROM configs WHERE project_id = {project_id};
+                    DELETE FROM projects WHERE id = {project_id};
+                """)
+                conn.commit()
+                return True
+        except Exception:
+            return False
+
+    def update_project_description(self, project_id: int, new_description: str) -> bool:
+        """更新项目描述"""
+        try:
+            with self.get_connection() as conn:
+                cursor = conn.execute(
+                    "UPDATE projects SET description = ? WHERE id = ?",
+                    (new_description, project_id)
+                )
+                conn.commit()
+                return cursor.rowcount > 0
+        except Exception:
+            return False
diff --git a/widgets/project_controller.py b/widgets/project_controller.py
new file mode 100644
index 0000000..d93f68e
--- /dev/null
+++ b/widgets/project_controller.py
@@ -0,0 +1,124 @@
+from PySide6.QtCore import QObject, Signal
+from PySide6.QtWidgets import QMessageBox
+from database.db_manager import DatabaseManager
+from database.models import ProjectData
+from typing import Optional
+from widgets.project_dialog import AddProjectDialog
+
+class ProjectController(QObject):
+    # 定义信号
+    project_changed = Signal(ProjectData)  # 项目变更信号
+    project_renamed = Signal(str)  # 项目重命名信号
+    project_deleted = Signal()  # 项目删除信号
+    
+    def __init__(self, db_manager: DatabaseManager, view: 'AVAS_WIDGET'):
+        super().__init__()
+        self.db_manager = db_manager
+        self.view = view
+        self.current_project: Optional[ProjectData] = None
+    
+    def _notify_project_changed(self):
+        """通知项目变更"""
+        self.project_changed.emit(self.current_project)
+        if self.current_project:
+            self.project_renamed.emit(self.current_project.name)
+    
+    def create_project(self) -> bool:
+        """创建新项目"""
+        dialog = AddProjectDialog(self.view)
+        if dialog.exec():
+            name, description = dialog.get_project_data()
+            
+            if not name:
+                QMessageBox.warning(self.view, "警告", "项目名称不能为空！")
+                return False
+                
+            try:
+                project_id = self.db_manager.add_project(name, description)
+                self.current_project = ProjectData(
+                    id=project_id,
+                    name=name,
+                    description=description,
+                    created_at=None
+                )
+                self._notify_project_changed()
+                return True
+                
+            except Exception as e:
+                QMessageBox.critical(self.view, "错误", f"创建项目失败：{str(e)}")
+                return False
+        return False
+    
+    def select_project(self, project_id: int) -> bool:
+        """选择项目"""
+        projects = self.db_manager.get_all_projects()
+        for project in projects:
+            if project.id == project_id:
+                self.current_project = project
+                self._notify_project_changed()
+                return True
+        return False
+    
+    def rename_project(self, new_name: str) -> bool:
+        """重命名项目"""
+        if not self.current_project:
+            QMessageBox.warning(self.view, "警告", "请先选择项目！")
+            return False
+            
+        if not new_name:
+            QMessageBox.warning(self.view, "警告", "项目名称不能为空！")
+            return False
+            
+        try:
+            if self.db_manager.update_project_name(self.current_project.id, new_name):
+                self.current_project.name = new_name
+                self._notify_project_changed()
+                return True
+            else:
+                QMessageBox.warning(self.view, "警告", "项目名称已存在！")
+                return False
+        except Exception as e:
+            QMessageBox.critical(self.view, "错误", f"重命名项目失败：{str(e)}")
+            return False
+    
+    def update_project_description(self, new_description: str) -> bool:
+        """更新项目描述"""
+        if not self.current_project:
+            QMessageBox.warning(self.view, "警告", "请先选择项目！")
+            return False
+            
+        try:
+            if self.db_manager.update_project_description(self.current_project.id, new_description):
+                self.current_project.description = new_description
+                self._notify_project_changed()
+                return True
+            return False
+        except Exception as e:
+            QMessageBox.critical(self.view, "错误", f"更新项目描述失败：{str(e)}")
+            return False
+    
+    def delete_project(self) -> bool:
+        """删除项目"""
+        if not self.current_project:
+            QMessageBox.warning(self.view, "警告", "请先选择项目！")
+            return False
+            
+        reply = QMessageBox.question(
+            self.view,
+            "确认删除",
+            f"确定要删除项目 '{self.current_project.name}' 吗？\n此操作将同时删除项目下的所有配置！",
+            QMessageBox.Yes | QMessageBox.No,
+            QMessageBox.No
+        )
+        
+        if reply == QMessageBox.Yes:
+            try:
+                if self.db_manager.delete_project(self.current_project.id):
+                    self.current_project = None
+                    self.project_deleted.emit()
+                    return True
+                return False
+            except Exception as e:
+                QMessageBox.critical(self.view, "错误", f"删除项目失败：{str(e)}")
+                return False
+        return False 
\ No newline at end of file