diff --git a/server/src/main/java/com/talkka/server/config/SecurityConfig.java b/server/src/main/java/com/talkka/server/config/SecurityConfig.java
index 561bcca8..81fd89de 100644
--- a/server/src/main/java/com/talkka/server/config/SecurityConfig.java
+++ b/server/src/main/java/com/talkka/server/config/SecurityConfig.java
@@ -5,9 +5,9 @@
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
 import org.springframework.security.web.SecurityFilterChain;
+import org.springframework.security.web.authentication.www.BasicAuthenticationFilter;
 
-import com.talkka.server.oauth.OAuth2LoginFailureHandler;
-import com.talkka.server.oauth.OAuth2LoginSuccessHandler;
+import com.talkka.server.oauth.filter.UnregisteredUserFilter;
 import com.talkka.server.oauth.service.CustomOAuth2Service;
 
 import lombok.RequiredArgsConstructor;
@@ -17,8 +17,6 @@
 public class SecurityConfig {
 
 	private final CustomOAuth2Service customOAuth2Service;
-	private final OAuth2LoginSuccessHandler oAuth2LoginSuccessHandler;
-	private final OAuth2LoginFailureHandler oAuth2LoginFailureHandler;
 
 	@Bean
 	public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
@@ -26,12 +24,18 @@ public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Excepti
 			.csrf(AbstractHttpConfigurer::disable)
 			.cors(AbstractHttpConfigurer::disable)
 			.authorizeHttpRequests(authorize -> authorize
-				.requestMatchers("/auth/**").permitAll()
-				.anyRequest().authenticated())
+				.requestMatchers("/auth/**", "/login/**").permitAll()
+				.anyRequest().authenticated()
+			)
+			.addFilterAfter(new UnregisteredUserFilter(), BasicAuthenticationFilter.class)
 			.oauth2Login(oauth -> oauth
 				.userInfoEndpoint(userInfo -> userInfo.userService(customOAuth2Service))
-				.successHandler(oAuth2LoginSuccessHandler)
-				.failureHandler(oAuth2LoginFailureHandler)
+				.defaultSuccessUrl("/")
+			)
+			.exceptionHandling(exceptionHandling -> exceptionHandling
+				.authenticationEntryPoint((request, response, authException) -> {
+					response.sendRedirect("/auth/login");
+				})
 			);
 		return http.build();
 	}
diff --git a/server/src/main/java/com/talkka/server/oauth/OAuth2LoginFailureHandler.java b/server/src/main/java/com/talkka/server/oauth/OAuth2LoginFailureHandler.java
deleted file mode 100644
index 5951e25b..00000000
--- a/server/src/main/java/com/talkka/server/oauth/OAuth2LoginFailureHandler.java
+++ /dev/null
@@ -1,25 +0,0 @@
-package com.talkka.server.oauth;
-
-import java.io.IOException;
-
-import org.springframework.security.core.AuthenticationException;
-import org.springframework.security.web.authentication.SimpleUrlAuthenticationFailureHandler;
-import org.springframework.stereotype.Component;
-
-import jakarta.servlet.ServletException;
-import jakarta.servlet.http.HttpServletRequest;
-import jakarta.servlet.http.HttpServletResponse;
-
-@Component
-public class OAuth2LoginFailureHandler extends SimpleUrlAuthenticationFailureHandler {
-
-	@Override
-	public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response,
-		AuthenticationException exception) throws IOException, ServletException {
-
-		request.getSession().invalidate();
-		String defaultFailureUrl = "/auth/login";
-		setDefaultFailureUrl(defaultFailureUrl);
-		super.onAuthenticationFailure(request, response, exception);
-	}
-}
diff --git a/server/src/main/java/com/talkka/server/oauth/OAuth2LoginSuccessHandler.java b/server/src/main/java/com/talkka/server/oauth/OAuth2LoginSuccessHandler.java
deleted file mode 100644
index 333fb68a..00000000
--- a/server/src/main/java/com/talkka/server/oauth/OAuth2LoginSuccessHandler.java
+++ /dev/null
@@ -1,32 +0,0 @@
-package com.talkka.server.oauth;
-
-import java.io.IOException;
-
-import org.springframework.security.core.Authentication;
-import org.springframework.security.web.authentication.SimpleUrlAuthenticationSuccessHandler;
-import org.springframework.stereotype.Component;
-
-import com.talkka.server.oauth.domain.AuthUserDto;
-import com.talkka.server.oauth.domain.CustomUserPrincipal;
-import com.talkka.server.user.service.UserService;
-
-import jakarta.servlet.ServletException;
-import jakarta.servlet.http.HttpServletRequest;
-import jakarta.servlet.http.HttpServletResponse;
-import lombok.RequiredArgsConstructor;
-
-@Component
-@RequiredArgsConstructor
-public class OAuth2LoginSuccessHandler extends SimpleUrlAuthenticationSuccessHandler {
-
-	private final UserService userService;
-
-	@Override
-	public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response,
-		Authentication authentication) throws IOException, ServletException {
-		AuthUserDto userDto = ((CustomUserPrincipal)authentication.getPrincipal()).getUser();
-		if (!userDto.getIsRegistered()) {
-			getRedirectStrategy().sendRedirect(request, response, "/auth/signUp");
-		}
-	}
-}
diff --git a/server/src/main/java/com/talkka/server/oauth/controller/AuthController.java b/server/src/main/java/com/talkka/server/oauth/controller/AuthController.java
index 60c6b6ff..f8a210ce 100644
--- a/server/src/main/java/com/talkka/server/oauth/controller/AuthController.java
+++ b/server/src/main/java/com/talkka/server/oauth/controller/AuthController.java
@@ -8,8 +8,7 @@
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 
-import com.talkka.server.oauth.domain.AuthUserDto;
-import com.talkka.server.oauth.domain.CustomUserPrincipal;
+import com.talkka.server.oauth.domain.OAuth2UserInfo;
 import com.talkka.server.user.dto.UserCreateDto;
 import com.talkka.server.user.dto.UserDto;
 import com.talkka.server.user.service.UserService;
@@ -30,32 +29,30 @@ public String loginForm() {
 	}
 
 	@GetMapping("/signUp")
-	public String signUpForm(Model model, @AuthenticationPrincipal CustomUserPrincipal principal) {
-		AuthUserDto userDto = principal.getUser();
-		model.addAttribute("user", userDto);
+	public String signUpForm(Model model, @AuthenticationPrincipal OAuth2UserInfo principal) {
+		model.addAttribute("name", principal.getName());
+		model.addAttribute("email", principal.getEmail());
 		return "signUpForm";
 	}
 
-	@SuppressWarnings("checkstyle:WhitespaceAround")
 	@PostMapping("/signUp")
 	public String signUp(@RequestParam("nickname") String nickname,
 		Model model,
-		@AuthenticationPrincipal CustomUserPrincipal principal,
+		@AuthenticationPrincipal OAuth2UserInfo principal,
 		HttpServletRequest request) {
 		if (userService.isDuplicatedNickname(nickname)) {
 			return "signUpForm";
 		}
-		AuthUserDto authUserDto = principal.getUser();
 		UserCreateDto userCreateDto = UserCreateDto.builder()
-			.name(authUserDto.getName())
-			.email(authUserDto.getEmail())
-			.oauthProvider(authUserDto.getProvider())
+			.name(principal.getName())
+			.email(principal.getEmail())
+			.oauthProvider(principal.getProvider())
 			.nickname(nickname)
-			.accessToken(authUserDto.getAccessToken())
+			.accessToken(principal.getAccessToken())
 			.build();
 		UserDto user = userService.createUser(userCreateDto);
 		request.getSession().invalidate();
-		return "redirect:/";
+		return "redirect:/oauth2/authorization/naver";
 	}
 
 	@GetMapping("/login/naver")
diff --git a/server/src/main/java/com/talkka/server/oauth/controller/BaseController.java b/server/src/main/java/com/talkka/server/oauth/controller/BaseController.java
new file mode 100644
index 00000000..c5da0243
--- /dev/null
+++ b/server/src/main/java/com/talkka/server/oauth/controller/BaseController.java
@@ -0,0 +1,23 @@
+package com.talkka.server.oauth.controller;
+
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+
+import com.talkka.server.oauth.domain.OAuth2UserInfo;
+
+// 인증 테스트를 위한 임시 컨트롤러
+@Controller
+public class BaseController {
+	@GetMapping("/")
+	public String authIndex(Model model, @AuthenticationPrincipal OAuth2UserInfo userInfo) {
+		model.addAttribute("name", userInfo.getName());
+		model.addAttribute("email", userInfo.getEmail());
+		model.addAttribute("nickname", userInfo.getNickName());
+		model.addAttribute("oauth2Id", userInfo.getOAuth2Id());
+		model.addAttribute("provider", userInfo.getProvider());
+		model.addAttribute("accessToken", userInfo.getAccessToken());
+		return "index";
+	}
+}
diff --git a/server/src/main/java/com/talkka/server/oauth/domain/AuthUserDto.java b/server/src/main/java/com/talkka/server/oauth/domain/AuthUserDto.java
deleted file mode 100644
index 1e06e44a..00000000
--- a/server/src/main/java/com/talkka/server/oauth/domain/AuthUserDto.java
+++ /dev/null
@@ -1,18 +0,0 @@
-package com.talkka.server.oauth.domain;
-
-import lombok.AllArgsConstructor;
-import lombok.Builder;
-import lombok.Data;
-import lombok.NoArgsConstructor;
-
-@Data
-@AllArgsConstructor
-@NoArgsConstructor
-@Builder
-public class AuthUserDto {
-	private String name;
-	private String email;
-	private String accessToken;
-	private String provider;
-	private Boolean isRegistered;
-}
diff --git a/server/src/main/java/com/talkka/server/oauth/domain/CustomUserPrincipal.java b/server/src/main/java/com/talkka/server/oauth/domain/CustomUserPrincipal.java
deleted file mode 100644
index 22c1c32e..00000000
--- a/server/src/main/java/com/talkka/server/oauth/domain/CustomUserPrincipal.java
+++ /dev/null
@@ -1,34 +0,0 @@
-package com.talkka.server.oauth.domain;
-
-import java.util.Collection;
-import java.util.Collections;
-import java.util.Map;
-
-import org.springframework.security.core.GrantedAuthority;
-import org.springframework.security.core.authority.SimpleGrantedAuthority;
-import org.springframework.security.oauth2.core.user.OAuth2User;
-
-import lombok.Getter;
-import lombok.RequiredArgsConstructor;
-
-@Getter
-@RequiredArgsConstructor
-public class CustomUserPrincipal implements OAuth2User {
-	private final AuthUserDto user;
-	private final Map<String, Object> attributes;
-
-	@Override
-	public Map<String, Object> getAttributes() {
-		return attributes;
-	}
-
-	@Override
-	public Collection<? extends GrantedAuthority> getAuthorities() {
-		return Collections.singletonList(new SimpleGrantedAuthority("ROLE_USER"));
-	}
-
-	@Override
-	public String getName() {
-		return user.getName();
-	}
-}
diff --git a/server/src/main/java/com/talkka/server/oauth/domain/NaverOAuth2User.java b/server/src/main/java/com/talkka/server/oauth/domain/NaverOAuth2User.java
new file mode 100644
index 00000000..5beb43e4
--- /dev/null
+++ b/server/src/main/java/com/talkka/server/oauth/domain/NaverOAuth2User.java
@@ -0,0 +1,23 @@
+package com.talkka.server.oauth.domain;
+
+import java.util.Collection;
+import java.util.Map;
+
+import org.springframework.security.core.GrantedAuthority;
+
+public class NaverOAuth2User extends OAuth2UserInfo {
+
+	public NaverOAuth2User(Map<String, Object> attributes) {
+		super((Map<String, Object>)attributes.get("response"));
+	}
+
+	public NaverOAuth2User(Map<String, Object> attributes, Collection<? extends GrantedAuthority> authorities) {
+		super((Map<String, Object>)attributes, authorities);
+	}
+
+	@Override
+	public String getProvider() {
+		return "NAVER";
+	}
+
+}
diff --git a/server/src/main/java/com/talkka/server/oauth/domain/OAuth2UserInfo.java b/server/src/main/java/com/talkka/server/oauth/domain/OAuth2UserInfo.java
new file mode 100644
index 00000000..7832f1e6
--- /dev/null
+++ b/server/src/main/java/com/talkka/server/oauth/domain/OAuth2UserInfo.java
@@ -0,0 +1,60 @@
+package com.talkka.server.oauth.domain;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+import org.springframework.security.oauth2.core.user.OAuth2User;
+
+public abstract class OAuth2UserInfo implements OAuth2User {
+
+	protected final Map<String, Object> attributes;
+	private final Collection<? extends GrantedAuthority> authorities;
+
+	public OAuth2UserInfo(Map<String, Object> attributes, Collection<? extends GrantedAuthority> authorities) {
+		this.attributes = attributes;
+		this.authorities = authorities;
+	}
+
+	// OAuth2 인증까지만 통과하면 UNREGISTERED 권한 부여
+	public OAuth2UserInfo(Map<String, Object> attributes) {
+		this.attributes = attributes;
+		this.authorities = List.of(new SimpleGrantedAuthority("UNREGISTERED"));
+	}
+
+	@Override
+	public Map<String, Object> getAttributes() {
+		return attributes;
+	}
+
+	@Override
+	public Collection<? extends GrantedAuthority> getAuthorities() {
+		return authorities;
+	}
+
+	@Override
+	public String getName() {
+		return (String)attributes.get("name");
+	}
+
+	public String getOAuth2Id() {
+		return (String)attributes.get("id");
+	}
+
+	public String getEmail() {
+		return (String)attributes.get("email");
+	}
+
+	public String getAccessToken() {
+		return (String)attributes.get("accessToken");
+	}
+
+	public String getNickName() {
+		return (String)attributes.get("nickname");
+	}
+
+	// oauth provider 는 각 제공자 별로 구현
+	public abstract String getProvider();
+}
diff --git a/server/src/main/java/com/talkka/server/oauth/filter/UnregisteredUserFilter.java b/server/src/main/java/com/talkka/server/oauth/filter/UnregisteredUserFilter.java
new file mode 100644
index 00000000..3cbda63e
--- /dev/null
+++ b/server/src/main/java/com/talkka/server/oauth/filter/UnregisteredUserFilter.java
@@ -0,0 +1,51 @@
+package com.talkka.server.oauth.filter;
+
+import java.io.IOException;
+import java.util.Collection;
+
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.context.SecurityContextHolder;
+
+import jakarta.servlet.Filter;
+import jakarta.servlet.FilterChain;
+import jakarta.servlet.FilterConfig;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.ServletRequest;
+import jakarta.servlet.ServletResponse;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+public class UnregisteredUserFilter implements Filter {
+
+	@Override
+	public void init(FilterConfig filterConfig) throws ServletException {
+	}
+
+	@Override
+	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
+		throws IOException, ServletException {
+		HttpServletRequest httpRequest = (HttpServletRequest)request;
+		HttpServletResponse httpResponse = (HttpServletResponse)response;
+
+		Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
+
+		if (authentication != null) {
+			Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();
+			for (GrantedAuthority authority : authorities) {
+				if (authority.getAuthority().equals("UNREGISTERED")
+					&& !httpRequest.getRequestURI().equals("/auth/signUp")) {
+					httpResponse.sendRedirect("/auth/signUp");
+					return;
+				}
+			}
+		}
+
+		chain.doFilter(request, response);
+	}
+
+	@Override
+	public void destroy() {
+	}
+
+}
diff --git a/server/src/main/java/com/talkka/server/oauth/service/CustomOAuth2Service.java b/server/src/main/java/com/talkka/server/oauth/service/CustomOAuth2Service.java
index f2fda553..5e563731 100644
--- a/server/src/main/java/com/talkka/server/oauth/service/CustomOAuth2Service.java
+++ b/server/src/main/java/com/talkka/server/oauth/service/CustomOAuth2Service.java
@@ -1,16 +1,19 @@
 package com.talkka.server.oauth.service;
 
-import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
 import org.springframework.security.oauth2.client.userinfo.DefaultOAuth2UserService;
 import org.springframework.security.oauth2.client.userinfo.OAuth2UserRequest;
 import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
 import org.springframework.security.oauth2.core.user.OAuth2User;
 import org.springframework.stereotype.Service;
 
-import com.talkka.server.oauth.domain.AuthUserDto;
-import com.talkka.server.oauth.domain.CustomUserPrincipal;
+import com.talkka.server.oauth.domain.NaverOAuth2User;
+import com.talkka.server.oauth.domain.OAuth2UserInfo;
+import com.talkka.server.user.dao.UserEntity;
 import com.talkka.server.user.dao.UserRepository;
 
 import lombok.RequiredArgsConstructor;
@@ -21,26 +24,23 @@ public class CustomOAuth2Service extends DefaultOAuth2UserService {
 
 	private final UserRepository userRepository;
 
-	@SuppressWarnings("checkstyle:RegexpSingleline")
 	@Override
 	public OAuth2User loadUser(OAuth2UserRequest userRequest) throws OAuth2AuthenticationException {
-		OAuth2User oAuth2User = super.loadUser(userRequest);
-		Map<String, Object> tmpMap = oAuth2User.getAttribute("response");
-		assert tmpMap != null;
-		String email = (String)tmpMap.get("email");
-		String name = (String)tmpMap.get("name");
+
+		// Spring Security가 auth provider(naver, kakao, google..)에게 인증 정보를 받아옴
+		// 이 시점에선 UNREGISTERED 권한 가지고 있음
+		OAuth2UserInfo oAuth2User = new NaverOAuth2User(super.loadUser(userRequest).getAttributes());
 		String accessToken = userRequest.getAccessToken().getTokenValue();
-		String provider = userRequest.getClientRegistration().getClientName();
-		boolean isRegistered = userRepository.existsByEmail(email);
-
-		AuthUserDto userDto = AuthUserDto.builder()
-			.name(name)
-			.email(email)
-			.accessToken(accessToken)
-			.provider(provider)
-			.isRegistered(isRegistered)
-			.build();
-
-		return new CustomUserPrincipal(userDto, new HashMap<>());
+		oAuth2User.getAttributes().put("accessToken", accessToken);
+		// 만약 DB에 회원정보가 있으면 ROLE_USER 권한 새로 부여
+		Optional<UserEntity> optionalUser = userRepository.findByEmail(oAuth2User.getEmail());
+		if (optionalUser.isPresent()) {
+			UserEntity user = optionalUser.get();
+			Map<String, Object> attributes = oAuth2User.getAttributes();
+			attributes.put("nickname", user.getNickname());
+			return new NaverOAuth2User(attributes,
+				List.of(new SimpleGrantedAuthority("ROLE_USER")));
+		}
+		return oAuth2User;
 	}
 }
diff --git a/server/src/main/java/com/talkka/server/user/dao/UserRepository.java b/server/src/main/java/com/talkka/server/user/dao/UserRepository.java
index f1515865..dd31ba04 100644
--- a/server/src/main/java/com/talkka/server/user/dao/UserRepository.java
+++ b/server/src/main/java/com/talkka/server/user/dao/UserRepository.java
@@ -1,5 +1,7 @@
 package com.talkka.server.user.dao;
 
+import java.util.Optional;
+
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
@@ -7,5 +9,5 @@
 public interface UserRepository extends JpaRepository<UserEntity, Long> {
 	boolean existsByNickname(String nickname);
 
-	boolean existsByEmail(String email);
+	Optional<UserEntity> findByEmail(String email);
 }
diff --git a/server/src/main/resources/templates/index.html b/server/src/main/resources/templates/index.html
new file mode 100644
index 00000000..f178ab8c
--- /dev/null
+++ b/server/src/main/resources/templates/index.html
@@ -0,0 +1,18 @@
+<!--인증 테스트를 위한 임시 뷰입니다.-->
+<!DOCTYPE html>
+<html xmlns:th="http://www.thymeleaf.org">
+<head>
+    <meta charset="UTF-8">
+    <title>홈</title>
+</head>
+<body>
+<h1>이건 홈이에요</h1>
+<h2>현재 로그인 된 유저</h2>
+<p>이름: <span th:text="${name}"></span></p>
+<p>이메일: <span th:text="${email}"></span></p>
+<p>닉네임: <span th:text="${nickname}"></span></p>
+<p>OAuth2 아이디: <span th:text="${oauth2Id}"></span></p>
+<p>제공자: <span th:text="${provider}"></span></p>
+<p>엑세스토큰: <span th:text="${accessToken}"></span></p>
+</body>
+</html>
diff --git a/server/src/main/resources/templates/loginForm.html b/server/src/main/resources/templates/loginForm.html
index 196c1c8d..13b88807 100644
--- a/server/src/main/resources/templates/loginForm.html
+++ b/server/src/main/resources/templates/loginForm.html
@@ -1,3 +1,4 @@
+<!--인증 테스트를 위한 임시 뷰입니다.-->
 <!DOCTYPE html>
 <html>
 <head>
diff --git a/server/src/main/resources/templates/signUpForm.html b/server/src/main/resources/templates/signUpForm.html
index 81eff877..53513376 100644
--- a/server/src/main/resources/templates/signUpForm.html
+++ b/server/src/main/resources/templates/signUpForm.html
@@ -1,43 +1,20 @@
+<!--인증 테스트를 위한 임시 뷰입니다.-->
 <!DOCTYPE html>
 <html xmlns:th="http://www.w3.org/1999/xhtml">
 <head>
     <meta charset="UTF-8">
     <title>회원가입 페이지</title>
-    <script>
-        function submitForm() {
-            const nickname = document.getElementById('nickname').value;
-
-            const formData = new FormData();
-            formData.append('name', document.getElementById('name').value);
-            formData.append('email', document.getElementById('email').value);
-            formData.append('nickname', nickname);
-
-            fetch('/auth/signUp', {
-                method: 'POST',
-                body: formData
-            })
-            .then(response => response.json())
-            .then(data => {
-                console.log('Success:', data);
-                // Handle success (e.g., redirect to another page or show a success message)
-            })
-            .catch((error) => {
-                console.error('Error:', error);
-                // Handle error (e.g., show an error message)
-            });
-        }
-    </script>
 </head>
 <body>
 <h1>회원가입 페이지 입니다</h1>
-<form onsubmit="event.preventDefault(); submitForm();">
+<form action="/auth/signUp" method="post">
     <div>
         <label for="name">이름:</label>
-        <input type="text" id="name" name="name" th:value="${user.name}" readonly>
+        <input type="text" id="name" name="name" th:value="${name}" readonly>
     </div>
     <div>
         <label for="email">이메일:</label>
-        <input type="email" id="email" name="email" th:value="${user.email}" readonly>
+        <input type="email" id="email" name="email" th:value="${email}" readonly>
     </div>
     <div>
         <label for="nickname">닉네임:</label>