diff --git a/src/hooks/auth/useAuth.ts b/src/hooks/auth/useAuth.ts
index dc0e39a..fbc576b 100644
--- a/src/hooks/auth/useAuth.ts
+++ b/src/hooks/auth/useAuth.ts
@@ -3,15 +3,15 @@ import { useCoreMutation } from "@/hooks/customQuery";
 import { login, sendEmail, signUp, verifyEmail } from "@/api/auth/auth";
 
 export const useAuth = () => {
+  const useLogin = useCoreMutation(login);
+  const useSignUp = useCoreMutation(signUp);
   const useSendCode = useCoreMutation(sendEmail);
   const useCheckCode = useCoreMutation(verifyEmail);
-  const useSignUp = useCoreMutation(signUp);
-  const useLogin = useCoreMutation(login);
 
   return {
+    useLogin,
+    useSignUp,
     useSendCode,
     useCheckCode,
-    useSignUp,
-    useLogin,
   };
 };
diff --git a/src/hooks/auth/useEmailVerification.ts b/src/hooks/auth/useEmailVerification.ts
index 721bdb8..ac39224 100644
--- a/src/hooks/auth/useEmailVerification.ts
+++ b/src/hooks/auth/useEmailVerification.ts
@@ -61,10 +61,10 @@ export const useEmailVerification = ({
     useSendCode.mutate(
       { email },
       {
-        onSuccess: () => {
+        onSuccess: (data) => {
           setSendCode(true);
           toast.success(successMessage);
-          restart();
+          restart(data.data.expireIn);
         },
         onError: (error) => {
           toast.error(
diff --git a/src/hooks/auth/useSocialLogin.ts b/src/hooks/auth/useSocialLogin.ts
new file mode 100644
index 0000000..f1c5838
--- /dev/null
+++ b/src/hooks/auth/useSocialLogin.ts
@@ -0,0 +1,13 @@
+import { type TSocialLoginPlatform } from "@/types/auth/auth";
+
+export const useSocialLogin = () => {
+  const handleSocialLogin = (platform: TSocialLoginPlatform) => {
+    const API_BASE_URL =
+      import.meta.env.VITE_API_BASE_URL || import.meta.env.VITE_API_TARGET_URL;
+
+    const baseUrl = `${API_BASE_URL}/oauth2/authorization/${platform}`;
+    window.location.href = `${baseUrl}`;
+  };
+
+  return { handleSocialLogin };
+};
diff --git a/src/hooks/common/useTimer.ts b/src/hooks/common/useTimer.ts
index e1e676e..282694e 100644
--- a/src/hooks/common/useTimer.ts
+++ b/src/hooks/common/useTimer.ts
@@ -69,10 +69,13 @@ export const useTimer = (
     setTimeLeft(Math.max(0, initialTime));
   }, [initialTime]);
 
-  const restart = useCallback(() => {
-    setTimeLeft(Math.max(0, initialTime));
-    setIsActive(true);
-  }, [initialTime]);
+  const restart = useCallback(
+    (newTime?: number) => {
+      setTimeLeft(Math.max(0, newTime ?? initialTime));
+      setIsActive(true);
+    },
+    [initialTime],
+  );
 
   const formattedTime = useMemo(() => {
     const minutes = Math.floor(timeLeft / 60);
diff --git a/src/lib/axiosInstance.ts b/src/lib/axiosInstance.ts
index 0342a6d..cde2d72 100644
--- a/src/lib/axiosInstance.ts
+++ b/src/lib/axiosInstance.ts
@@ -67,7 +67,7 @@ axiosInstance.interceptors.response.use(
         originalRequest.url?.includes("/api/auth/reissue") ||
         originalRequest._retry
       ) {
-        useAuthStore.getState().logout();
+        localStorage.removeItem("accessToken");
         return Promise.reject(error);
       }
 
diff --git a/src/pages/auth/Login.tsx b/src/pages/auth/Login.tsx
index dccc00f..57e3c40 100644
--- a/src/pages/auth/Login.tsx
+++ b/src/pages/auth/Login.tsx
@@ -7,6 +7,7 @@ import type { z } from "zod";
 import { loginSchema } from "@/utils/validation";
 
 import { useAuth } from "@/hooks/auth/useAuth";
+import { useSocialLogin } from "@/hooks/auth/useSocialLogin";
 
 import CommonAuthInput from "@/components/auth/common/CommonAuthInput";
 import Button from "@/components/common/Button";
@@ -31,13 +32,13 @@ export default function Login() {
   const navigate = useNavigate();
   const { useLogin } = useAuth();
   const { login: loginAction } = useAuthStore();
+  const { handleSocialLogin } = useSocialLogin();
 
   const onSubmit: SubmitHandler<TLoginFormValues> = (data) => {
     useLogin.mutate(data, {
       onSuccess: (response) => {
         const { accessToken } = response.data;
-        localStorage.setItem("accessToken", accessToken);
-        loginAction(data.email);
+        loginAction(data.email, accessToken);
         navigate("/", { replace: true });
       },
       onError: (error: any) => {
@@ -92,9 +93,7 @@ export default function Login() {
               type="button"
               className="w-14 h-14 rounded-full flex items-center justify-center bg-social-kakao hover:scale-110 transition-transform duration-200 shadow-sm"
               aria-label="카카오로 로그인"
-              onClick={() => {
-                // 소셜 로그인
-              }}
+              onClick={() => handleSocialLogin("kakao")}
             >
               <KakaoIcon className="w-6 h-auto" />
             </button>
@@ -103,9 +102,7 @@ export default function Login() {
               type="button"
               className="w-14 h-14 rounded-full flex items-center justify-center bg-social-naver hover:scale-110 transition-transform duration-200 shadow-sm"
               aria-label="네이버로 로그인"
-              onClick={() => {
-                // 소셜 로그인
-              }}
+              onClick={() => handleSocialLogin("naver")}
             >
               <NaverIcon className="w-5 h-auto text-white" />
             </button>
@@ -114,9 +111,7 @@ export default function Login() {
               type="button"
               className="w-14 h-14 rounded-full flex items-center justify-center bg-white border border-gray-100 hover:scale-110 transition-transform duration-200 shadow-sm"
               aria-label="구글로 로그인"
-              onClick={() => {
-                // 소셜 로그인
-              }}
+              onClick={() => toast.error("준비중입니다.")}
             >
               <GoogleIcon className="w-6 h-auto" />
             </button>
diff --git a/src/pages/auth/RedirectPage.tsx b/src/pages/auth/RedirectPage.tsx
new file mode 100644
index 0000000..be011a8
--- /dev/null
+++ b/src/pages/auth/RedirectPage.tsx
@@ -0,0 +1,46 @@
+import { useEffect, useRef } from "react";
+import { useNavigate } from "react-router-dom";
+import { toast } from "sonner";
+
+import useAuthStore from "@/store/useAuthStore";
+
+export default function RedirectPage() {
+  const navigate = useNavigate();
+  const { login, setSocialId, setEmail } = useAuthStore();
+  const processed = useRef(false);
+
+  useEffect(() => {
+    if (processed.current) return;
+    processed.current = true;
+
+    const getCookie = (name: string) => {
+      const value = `; ${document.cookie}`;
+      const parts = value.split(`; ${name}=`);
+      if (parts.length === 2) return parts.pop()?.split(";").shift();
+    };
+
+    const accessToken = getCookie("access_token");
+
+    if (accessToken) {
+      // TODO: Zustand 로그인 상태 업데이트 - 추후 내 정보 조회 API 연동 시 수정
+      login("social@user.com", accessToken);
+
+      toast.success("소셜 로그인되었습니다.");
+      navigate("/", { replace: true });
+    } else {
+      console.error("No access token found in cookies.");
+      toast.error("소셜 로그인에 실패했습니다. 다시 시도해주세요.");
+      navigate("/login", { replace: true });
+    }
+  }, [navigate, login, setEmail, setSocialId]);
+
+  return (
+    <div className="relative flex justify-center items-center h-screen w-full bg-white">
+      <div className="relative flex justify-center h-75 min-w-70 w-112.5 max-w-[96vw]">
+        <div className="absolute top-80 text-[20px] text-gray-500 font-medium animate-pulse">
+          로그인 중...
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/src/pages/auth/Signup.tsx b/src/pages/auth/Signup.tsx
index 5fb092a..23fa626 100644
--- a/src/pages/auth/Signup.tsx
+++ b/src/pages/auth/Signup.tsx
@@ -1,6 +1,8 @@
 import { useEffect, useState } from "react";
 import { Link, useLocation } from "react-router-dom";
 
+import { useSocialLogin } from "@/hooks/auth/useSocialLogin";
+
 import Step01Email from "@/components/auth/signupStep/Step01Email";
 import Step02Password from "@/components/auth/signupStep/Step02Password";
 import Step03Profile from "@/components/auth/signupStep/Step03Profile";
@@ -31,6 +33,8 @@ export default function Signup() {
     setStep((prev) => prev + 1);
   };
 
+  const { handleSocialLogin } = useSocialLogin();
+
   if (step === 1) {
     return <Step01Email onNext={handleNext} />;
   }
@@ -60,7 +64,7 @@ export default function Signup() {
           size="big"
           variant="custom"
           leftIcon={<GoogleIcon className="w-6 h-6" />}
-          onClick={() => {}}
+          onClick={() => handleSocialLogin("google")}
           className="bg-white border border-gray-100 text-text-main font-heading3 shadow-sm hover:bg-gray-50"
         >
           구글 로그인
@@ -71,7 +75,7 @@ export default function Signup() {
           size="big"
           variant="custom"
           leftIcon={<KakaoIcon className="w-6 h-6" />}
-          onClick={() => {}}
+          onClick={() => handleSocialLogin("kakao")}
           className="bg-social-kakao text-text-main font-heading3 shadow-sm hover:opacity-90"
         >
           카카오 로그인
@@ -82,7 +86,7 @@ export default function Signup() {
           size="big"
           variant="custom"
           leftIcon={<NaverIcon className="w-5 h-5 text-white" />}
-          onClick={() => {}}
+          onClick={() => handleSocialLogin("naver")}
           className="bg-social-naver text-white font-heading3 shadow-sm hover:opacity-90"
         >
           네이버 로그인
diff --git a/src/routes/AuthRoutes.tsx b/src/routes/AuthRoutes.tsx
index 0191d25..40e6ee3 100644
--- a/src/routes/AuthRoutes.tsx
+++ b/src/routes/AuthRoutes.tsx
@@ -21,6 +21,11 @@ const Login = loadable(
   <LoginSkeleton />,
 );
 
+const RedirectPage = loadable(
+  lazy(() => import("@/pages/auth/RedirectPage")),
+  <AuthFormSkeleton />,
+);
+
 // Signup은 Fallback이 달라짐 -> raw lazy 컴포넌트 사용
 const Signup = lazy(() => import("@/pages/auth/Signup"));
 
@@ -54,6 +59,10 @@ const AuthRoutes: RouteObject[] = [
     path: "find-pw",
     element: <FindPw />,
   },
+  {
+    path: "oauth2/redirect",
+    element: <RedirectPage />,
+  },
 ];
 
 export default AuthRoutes;
diff --git a/src/store/useAuthStore.ts b/src/store/useAuthStore.ts
index 7795ea9..bb19dff 100644
--- a/src/store/useAuthStore.ts
+++ b/src/store/useAuthStore.ts
@@ -5,7 +5,8 @@ interface IAuthState {
   email: string;
   password: string;
   socialId: number;
-  login: (email: string) => void;
+
+  login: (email: string, accessToken: string) => void;
   logout: () => void;
   setEmail: (email: string) => void;
   setPassword: (password: string) => void;
@@ -18,11 +19,15 @@ const useAuthStore = create<IAuthState>((set) => ({
   email: "",
   password: "",
   socialId: -1,
-  login: (email) => set({ isLoggedIn: true, email }),
+  login: (email, accessToken) => {
+    localStorage.setItem("accessToken", accessToken);
+    set({ isLoggedIn: true, email });
+  },
   logout: () => {
     localStorage.removeItem("accessToken");
     set({ isLoggedIn: false, email: "", password: "", socialId: -1 });
   },
+
   setEmail: (email) => set({ email }),
   setPassword: (password) => set({ password }),
   setSocialId: (socialId) => set({ socialId }),
diff --git a/src/types/auth/auth.ts b/src/types/auth/auth.ts
index 4909acd..32be6fc 100644
--- a/src/types/auth/auth.ts
+++ b/src/types/auth/auth.ts
@@ -1,22 +1,22 @@
-// 이메일 인증 코드 전송 요청 타입
+// 이메일 인증 전송 요청
 export interface IEmailSendRequest {
   email: string;
 }
 
-// 이메일 인증 코드 전송 응답 타입
+// 이메일 인증 전송 응답
 export interface IEmailSendResponse {
   message: string;
   email: string;
   expireIn: number;
 }
 
-// 이메일 인증 코드 확인 요청 타입
+// 이메일 인증 확인 요청
 export interface IEmailVerifyRequest {
   email: string;
   authCode: string;
 }
 
-// 회원가입 요청 타입
+// 회원가입 요청
 export interface ISignUpRequest {
   email: string;
   password: string;
@@ -24,33 +24,37 @@ export interface ISignUpRequest {
   phone_number: string;
 }
 
-// 회원가입 응답 타입
+// 회원가입 응답
 export interface ISignUpResponse {
   userId: number;
   createdAt: string;
 }
 
-// 로그인 요청 타입
+// 로그인 요청
 export interface ILoginRequest {
   email: string;
   password: string;
 }
+export type TLoginFormValues = ILoginRequest;
 
-// 로그인 응답 타입
+// 로그인 응답
 export interface ILoginResponse {
   grantType: string;
   accessToken: string;
   accessTokenExpiresIn: number;
 }
 
-// 토큰 재발급 요청 타입
+// 토큰 재발급 요청
 export interface ITokenRefreshRequest {
   refreshToken: string;
 }
 
-// 토큰 재발급 응답 타입
+// 토큰 재발급 응답
 export interface ITokenRefreshResponse {
   grantType: string;
   accessToken: string;
   accessTokenExpiresIn: number;
 }
+
+// 소셜 로그인 플랫폼
+export type TSocialLoginPlatform = "kakao" | "naver" | "google";