diff --git a/src/App.tsx b/src/App.tsx
index 93554bf..d9a075c 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,22 +1,23 @@
 import React, { Suspense, useEffect } from 'react'
 import { HashRouter, Route, Routes } from 'react-router-dom'
 import { useSelector } from 'react-redux'
-import { RootState } from './store'
+import { RootState } from 'src/store'
 
 import { CSpinner, useColorModes } from '@coreui/react'
-import './scss/style.scss'
+import 'src/scss/style.scss'
 
 // We use those styles to show code examples, you should remove them in your application.
-import './scss/examples.scss'
+import 'src/scss/examples.scss'
 
 // Containers
-const DefaultLayout = React.lazy(() => import('./layout/DefaultLayout'))
+const DefaultLayout = React.lazy(() => import('src/layout/DefaultLayout'))
 
 // Pages
-const Login = React.lazy(() => import('./views/pages/login/Login'))
-const Register = React.lazy(() => import('./views/pages/register/Register'))
-const Page404 = React.lazy(() => import('./views/pages/page404/Page404'))
-const Page500 = React.lazy(() => import('./views/pages/page500/Page500'))
+const Login = React.lazy(() => import('src/views/pages/login/Login'))
+const Register = React.lazy(() => import('src/views/pages/register/Register'))
+const Page404 = React.lazy(() => import('src/views/pages/page404/Page404'))
+const Page500 = React.lazy(() => import('src/views/pages/page500/Page500'))
+const ProtectedRoute = React.lazy(() => import('src/routes/ProtectedRoute'))
 
 const App = () => {
   const { isColorModeSet, setColorMode } = useColorModes('coreui-free-react-admin-template-theme')
@@ -47,10 +48,24 @@ const App = () => {
       >
         <Routes>
           <Route path="/login" element={<Login />} />
-          <Route path="/register" element={<Register />} />
+          <Route
+            path="/register"
+            element={
+              <ProtectedRoute>
+                <Register />
+              </ProtectedRoute>
+            }
+          />
           <Route path="/404" element={<Page404 />} />
           <Route path="/500" element={<Page500 />} />
-          <Route path="*" element={<DefaultLayout />} />
+          <Route
+            path="*"
+            element={
+              <ProtectedRoute>
+                <DefaultLayout />
+              </ProtectedRoute>
+            }
+          />
         </Routes>
       </Suspense>
     </HashRouter>
diff --git a/src/axios/authService.ts b/src/axios/authService.ts
index 7a7c3e7..9c3c17d 100644
--- a/src/axios/authService.ts
+++ b/src/axios/authService.ts
@@ -1,4 +1,4 @@
-import axios from './axios';
+import axios from 'src/axios/axios';
 import { jwtDecode } from 'jwt-decode';
 
 export const getAccessTokenFromCookie = (): string | null => {
@@ -30,7 +30,7 @@ export interface DecodedToken {
     encryptedPayload: string;
     memberId: string;
     memberName: string;
-    expiration: number;
+    exp: number;
 }
 
 // 로그인 API
@@ -48,8 +48,8 @@ export const register = async (data: RegisterData): Promise<{ message: string }>
 // 로그아웃 API
 export const logout = async (): Promise<void> => {
     await axios.post('/auth/logout');
-    //localStorage.removeItem('access_token');
-    //localStorage.removeItem('refresh_token');
+    localStorage.removeItem('accessToken');
+    localStorage.removeItem('refreshToken');
     document.cookie = 'access_token=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/';
     document.cookie = 'refresh_token=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/';
 };
@@ -60,7 +60,9 @@ export const isTokenValid = (token: string): boolean => {
         const decoded = jwtDecode<DecodedToken>(token);
         const currentTime = Date.now() / 1000;
 
-        return decoded.expiration > currentTime;
+        if (!decoded.exp) return false; // 만료 정보가 없으면 일단 유효하다고 판단하거나, 정책에 따라 변경 가능
+
+        return decoded.exp > currentTime;
     } catch (error) {
         return false;
     }
@@ -75,9 +77,3 @@ export const getUserFromToken = (token: string): DecodedToken | null => {
         return null;
     }
 };
-
-// 현재 사용자 정보 가져오기
-export const getCurrentUser = async () => {
-    const response = await axios.get('/auth/me');
-    return response.data;
-};
\ No newline at end of file
diff --git a/src/axios/axios.ts b/src/axios/axios.ts
index e077bfb..19bcba3 100644
--- a/src/axios/axios.ts
+++ b/src/axios/axios.ts
@@ -14,7 +14,7 @@ const instance = axios.create({
 // 요청 인터셉터
 instance.interceptors.request.use(
     (config) => {
-        const accessToken = localStorage.getItem('access_token');
+        const accessToken = localStorage.getItem('accessToken') || localStorage.getItem('access_token');
         if (accessToken) {
             config.headers.Authorization = `Bearer ${accessToken}`;
         }
diff --git a/src/components/AppBreadcrumb.tsx b/src/components/AppBreadcrumb.tsx
index d37de8c..49d7668 100644
--- a/src/components/AppBreadcrumb.tsx
+++ b/src/components/AppBreadcrumb.tsx
@@ -1,23 +1,29 @@
 import React from 'react'
 import { useLocation } from 'react-router-dom'
 
-import routes from '../routes'
+import routes from 'src/routes/routes'
 
 import { CBreadcrumb, CBreadcrumbItem } from '@coreui/react'
 
+interface Route {
+  path: string;
+  name: string;
+  exact?: boolean;
+}
+
 const AppBreadcrumb = () => {
   const currentLocation = useLocation().pathname
 
-  const getRouteName = (pathname, routes) => {
+  const getRouteName = (pathname: string, routes: Route[]): string | false => {
     const currentRoute = routes.find((route) => route.path === pathname)
     return currentRoute ? currentRoute.name : false
   }
 
-  const getBreadcrumbs = (location) => {
-    const breadcrumbs = []
-    location.split('/').reduce((prev, curr, index, array) => {
+  const getBreadcrumbs = (location: string) => {
+    const breadcrumbs: { pathname: string; name: string; active: boolean }[] = []
+    location.split('/').reduce((prev: string, curr: string, index: number, array: string[]) => {
       const currentPathname = `${prev}/${curr}`
-      const routeName = getRouteName(currentPathname, routes)
+      const routeName = getRouteName(currentPathname, routes as Route[])
       routeName &&
         breadcrumbs.push({
           pathname: currentPathname,
diff --git a/src/components/AppContent.tsx b/src/components/AppContent.tsx
index ef4424e..34f48fb 100644
--- a/src/components/AppContent.tsx
+++ b/src/components/AppContent.tsx
@@ -3,7 +3,7 @@ import { Navigate, Route, Routes } from 'react-router-dom'
 import { CContainer, CSpinner } from '@coreui/react'
 
 // routes config
-import routes from '../routes'
+import routes from 'src/routes/routes'
 
 const AppContent = () => {
   return (
diff --git a/src/components/AppHeader.tsx b/src/components/AppHeader.tsx
index 16d83ec..87a884f 100644
--- a/src/components/AppHeader.tsx
+++ b/src/components/AppHeader.tsx
@@ -1,7 +1,7 @@
 import React, { useEffect, useRef } from 'react'
 import { NavLink } from 'react-router-dom'
 import { useSelector, useDispatch } from 'react-redux'
-import { RootState } from '../store'
+import { RootState } from 'src/store'
 import {
   CContainer,
   CDropdown,
@@ -26,8 +26,8 @@ import {
   cilSun,
 } from '@coreui/icons'
 
-import { AppBreadcrumb } from './index'
-import { AppHeaderDropdown } from './header/index'
+import { AppBreadcrumb } from 'src/components/index'
+import { AppHeaderDropdown } from 'src/components/header/index'
 import { useAuth } from 'src/hooks/useAuth'
 
 const AppHeader = () => {
diff --git a/src/components/AppSidebar.tsx b/src/components/AppSidebar.tsx
index d75d4a9..d313728 100644
--- a/src/components/AppSidebar.tsx
+++ b/src/components/AppSidebar.tsx
@@ -1,7 +1,7 @@
 import React from 'react'
 import { NavLink } from 'react-router-dom'
 import { useSelector, useDispatch } from 'react-redux'
-import { RootState } from '../store'
+import { RootState } from 'src/store'
 
 import {
   CCloseButton,
@@ -13,13 +13,13 @@ import {
 } from '@coreui/react'
 import CIcon from '@coreui/icons-react'
 
-import { AppSidebarNav } from './AppSidebarNav'
+import { AppSidebarNav } from 'src/components/AppSidebarNav'
 
 import { logo } from 'src/assets/brand/logo'
 import { sygnet } from 'src/assets/brand/sygnet'
 
 // sidebar nav config
-import navigation from '../_nav'
+import navigation from 'src/_nav'
 
 const AppSidebar = () => {
   const dispatch = useDispatch()
diff --git a/src/components/DocsComponents.tsx b/src/components/DocsComponents.tsx
deleted file mode 100644
index b0968b8..0000000
--- a/src/components/DocsComponents.tsx
+++ /dev/null
@@ -1,46 +0,0 @@
-import PropTypes from 'prop-types'
-import React from 'react'
-
-import ComponentsImg from 'src/assets/images/components.webp'
-
-const DocsComponents = (props) => (
-  <div className="bg-primary bg-opacity-10 border border-2 border-primary rounded mb-4">
-    <div className="row d-flex align-items-center p-3 px-xl-4 flex-xl-nowrap">
-      <div className="col-xl-auto col-12 d-none d-xl-block p-0">
-        <img
-          className="img-fluid"
-          src={ComponentsImg}
-          width="160px"
-          height="160px"
-          alt="CoreUI PRO hexagon"
-        />
-      </div>
-      <div className="col-md col-12 px-lg-4">
-        Our Admin Panel isn’t just a mix of third-party components. It’s{' '}
-        <strong>
-          the only open-source React dashboard built on a professional, enterprise-grade UI
-          Components Library
-        </strong>
-        . This component is part of this library, and we present only the basic usage of it here. To
-        explore extended examples, detailed API documentation, and customization options, refer to
-        our docs.
-      </div>
-      <div className="col-md-auto col-12 mt-3 mt-lg-0">
-        <a
-          className="btn btn-primary text-nowrap text-white"
-          href={`https://coreui.io/react/docs/${props.href}`}
-          target="_blank"
-          rel="noopener noreferrer"
-        >
-          Explore Documentation
-        </a>
-      </div>
-    </div>
-  </div>
-)
-
-DocsComponents.propTypes = {
-  href: PropTypes.string,
-}
-
-export default DocsComponents
diff --git a/src/components/DocsExample.tsx b/src/components/DocsExample.tsx
deleted file mode 100644
index 2adedad..0000000
--- a/src/components/DocsExample.tsx
+++ /dev/null
@@ -1,43 +0,0 @@
-import PropTypes from 'prop-types'
-import React from 'react'
-import { CNav, CNavItem, CNavLink, CTabContent, CTabPane } from '@coreui/react'
-import CIcon from '@coreui/icons-react'
-import { cilCode, cilMediaPlay } from '@coreui/icons'
-
-const DocsExample = (props) => {
-  const { children, href, tabContentClassName } = props
-
-  const _href = `https://coreui.io/react/docs/${href}`
-
-  return (
-    <div className="example">
-      <CNav variant="underline-border">
-        <CNavItem>
-          <CNavLink href="#" active>
-            <CIcon icon={cilMediaPlay} className="me-2" />
-            Preview
-          </CNavLink>
-        </CNavItem>
-        <CNavItem>
-          <CNavLink href={_href} target="_blank">
-            <CIcon icon={cilCode} className="me-2" />
-            Code
-          </CNavLink>
-        </CNavItem>
-      </CNav>
-      <CTabContent className={`rounded-bottom ${tabContentClassName ? tabContentClassName : ''}`}>
-        <CTabPane className="p-3 preview" visible>
-          {children}
-        </CTabPane>
-      </CTabContent>
-    </div>
-  )
-}
-
-DocsExample.propTypes = {
-  children: PropTypes.node,
-  href: PropTypes.string,
-  tabContentClassName: PropTypes.string,
-}
-
-export default React.memo(DocsExample)
diff --git a/src/components/header/AppHeaderDropdown.tsx b/src/components/header/AppHeaderDropdown.tsx
index 9021a10..aac5acd 100644
--- a/src/components/header/AppHeaderDropdown.tsx
+++ b/src/components/header/AppHeaderDropdown.tsx
@@ -22,7 +22,7 @@ import {
 } from '@coreui/icons'
 import CIcon from '@coreui/icons-react'
 
-import avatar8 from './../../assets/images/avatars/8.jpg'
+import avatar8 from 'src/assets/images/avatars/8.jpg'
 
 const AppHeaderDropdown = () => {
   return (
diff --git a/src/components/header/index.tsx b/src/components/header/index.tsx
index bf8af6c..aeb6cf5 100644
--- a/src/components/header/index.tsx
+++ b/src/components/header/index.tsx
@@ -1,3 +1,3 @@
-import AppHeaderDropdown from './AppHeaderDropdown'
+import AppHeaderDropdown from 'src/components/header/AppHeaderDropdown'
 
 export { AppHeaderDropdown }
diff --git a/src/components/index.ts b/src/components/index.ts
index 93fb52c..9dab379 100644
--- a/src/components/index.ts
+++ b/src/components/index.ts
@@ -1,13 +1,11 @@
-import AppBreadcrumb from './AppBreadcrumb'
-import AppContent from './AppContent'
-import AppFooter from './AppFooter'
-import AppHeader from './AppHeader'
-import AppHeaderDropdown from './header/AppHeaderDropdown'
-import AppSidebar from './AppSidebar'
-import DocsComponents from './DocsComponents'
-import DocsIcons from './DocsIcons'
-import DocsLink from './DocsLink'
-import DocsExample from './DocsExample'
+import AppBreadcrumb from 'src/components/AppBreadcrumb'
+import AppContent from 'src/components/AppContent'
+import AppFooter from 'src/components/AppFooter'
+import AppHeader from 'src/components/AppHeader'
+import AppHeaderDropdown from 'src/components/header/AppHeaderDropdown'
+import AppSidebar from 'src/components/AppSidebar'
+import DocsIcons from 'src/components/DocsIcons'
+import DocsLink from 'src/components/DocsLink'
 
 export {
   AppBreadcrumb,
@@ -16,8 +14,6 @@ export {
   AppHeader,
   AppHeaderDropdown,
   AppSidebar,
-  DocsComponents,
   DocsIcons,
   DocsLink,
-  DocsExample,
 }
diff --git a/src/context/AuthContext.tsx b/src/context/AuthContext.tsx
index 440f223..e54be68 100644
--- a/src/context/AuthContext.tsx
+++ b/src/context/AuthContext.tsx
@@ -1,6 +1,6 @@
 import React, { createContext, useReducer, useEffect } from 'react';
 
-import { getCurrentUser, isTokenValid } from 'src/axios/authService';
+import { isTokenValid, getAccessTokenFromCookie, getUserFromToken } from 'src/axios/authService';
 
 // 사용자 타입 정의
 export interface Member {
@@ -33,13 +33,16 @@ const initialState: AuthState = {
     error: null
 };
 
-// Context 생성
-export const AuthContext = createContext<{
+// Context 타입 정의
+export interface AuthContextType {
     state: AuthState;
     dispatch: React.Dispatch<AuthAction>;
     login: (token: string, member: Member) => void;
     logout: () => void;
-}>({
+}
+
+// Context 생성
+export const AuthContext = createContext<AuthContextType>({
     state: initialState,
     dispatch: () => null,
     login: () => null,
@@ -118,7 +121,8 @@ export const AuthProvider: React.FC<{ children: React.ReactNode }> = ({ children
     // 초기 인증 상태 확인
     useEffect(() => {
         const loadUser = async () => {
-            const token = localStorage.getItem('accessToken');
+            // localStorage 또는 Cookie에서 토큰 확인
+            let token = localStorage.getItem('accessToken') || getAccessTokenFromCookie();
 
             if (!token || !isTokenValid(token)) {
                 dispatch({ type: 'LOGOUT' });
@@ -126,8 +130,21 @@ export const AuthProvider: React.FC<{ children: React.ReactNode }> = ({ children
             }
 
             try {
-                const member = await getCurrentUser();
-                dispatch({ type: 'MEMBER_LOADED', payload: member });
+                // 토큰이 쿠키에만 있고 localStorage에 없으면 저장해줌 (일관성 유지)
+                if (!localStorage.getItem('accessToken')) {
+                    localStorage.setItem('accessToken', token);
+                }
+
+                const decodedToken = getUserFromToken(token);
+                if (decodedToken) {
+                    const member: Member = {
+                        memberId: decodedToken.memberId,
+                        memberName: decodedToken.memberName
+                    };
+                    dispatch({ type: 'MEMBER_LOADED', payload: member });
+                } else {
+                    dispatch({ type: 'AUTH_ERROR', payload: 'Invalid token' });
+                }
             } catch (error) {
                 dispatch({ type: 'AUTH_ERROR', payload: 'Authentication failed' });
             }
diff --git a/src/hooks/useAuth.ts b/src/hooks/useAuth.ts
index efca210..1c291bd 100644
--- a/src/hooks/useAuth.ts
+++ b/src/hooks/useAuth.ts
@@ -1,10 +1,10 @@
 import { useContext } from 'react';
-import { AuthContext } from '../context/AuthContext';
+import { AuthContext, AuthContextType } from 'src/context/AuthContext';
 
-export const useAuth = () => {
+export const useAuth = (): AuthContextType => {
     const context = useContext(AuthContext);
 
-    if (context === undefined) {
+    if (!context) {
         throw new Error('useAuth must be used within an AuthProvider');
     }
 
diff --git a/src/index.tsx b/src/index.tsx
index 14542f6..97006da 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -3,9 +3,9 @@ import { createRoot } from 'react-dom/client'
 import { Provider } from 'react-redux'
 import 'core-js'
 
-import App from './App'
-import store from './store'
-import { AuthProvider } from './context/AuthContext'
+import App from 'src/App'
+import store from 'src/store'
+import { AuthProvider } from 'src/context/AuthContext'
 
 createRoot(document.getElementById('root')!).render(
   <Provider store={store}>
diff --git a/src/layout/DefaultLayout.tsx b/src/layout/DefaultLayout.tsx
index 19fbf22..1e94820 100644
--- a/src/layout/DefaultLayout.tsx
+++ b/src/layout/DefaultLayout.tsx
@@ -1,5 +1,5 @@
 import React from 'react'
-import { AppContent, AppSidebar, AppFooter, AppHeader } from '../components/index'
+import { AppContent, AppSidebar, AppFooter, AppHeader } from 'src/components/index'
 
 const DefaultLayout = () => {
   return (
diff --git a/src/routes/ProtectedRoute.tsx b/src/routes/ProtectedRoute.tsx
new file mode 100644
index 0000000..68a0214
--- /dev/null
+++ b/src/routes/ProtectedRoute.tsx
@@ -0,0 +1,28 @@
+import React from 'react';
+import { Navigate, useLocation } from 'react-router-dom';
+import { useAuth } from 'src/hooks/useAuth';
+import { CSpinner } from '@coreui/react';
+
+const ProtectedRoute: React.FC<{ children: React.ReactNode }> = ({ children }) => {
+    const { state } = useAuth();
+    const { isAuthenticated, loading } = state;
+    const location = useLocation();
+
+    if (loading) {
+        return (
+            <div className="pt-3 text-center">
+                <CSpinner color="primary" variant="grow" />
+            </div>
+        );
+    }
+
+    if (!isAuthenticated) {
+        // 로그인 되지 않았다면 로그인 페이지로 리다이렉트
+        // 현재 위치를 state에 저장하여 로그인 후 다시 돌아올 수 있게 함
+        return <Navigate to="/login" state={{ from: location }} replace />;
+    }
+
+    return <>{children}</>;
+};
+
+export default ProtectedRoute;
diff --git a/src/routes.ts b/src/routes/routes.ts
similarity index 62%
rename from src/routes.ts
rename to src/routes/routes.ts
index ad97fbb..da4b3aa 100644
--- a/src/routes.ts
+++ b/src/routes/routes.ts
@@ -1,8 +1,8 @@
 import React from 'react'
 
-const Dashboard = React.lazy(() => import('./views/dashboard/Dashboard'))
-const Colors = React.lazy(() => import('./views/theme/colors/Colors'))
-const Typography = React.lazy(() => import('./views/theme/typography/Typography'))
+const Dashboard = React.lazy(() => import('src/views/dashboard/Dashboard'))
+const Colors = React.lazy(() => import('src/views/theme/colors/Colors'))
+const Typography = React.lazy(() => import('src/views/theme/typography/Typography'))
 
 const routes = [
   { path: '/', exact: true, name: 'Home' },
diff --git a/src/views/dashboard/Dashboard.tsx b/src/views/dashboard/Dashboard.tsx
index 82ddd12..63d6f5a 100644
--- a/src/views/dashboard/Dashboard.tsx
+++ b/src/views/dashboard/Dashboard.tsx
@@ -50,7 +50,7 @@ import avatar4 from 'src/assets/images/avatars/4.jpg'
 import avatar5 from 'src/assets/images/avatars/5.jpg'
 import avatar6 from 'src/assets/images/avatars/6.jpg'
 
-import MainChart from './MainChart'
+import MainChart from 'src/views/dashboard/MainChart'
 
 const Dashboard = () => {
   const tableExample = [