diff --git a/app/src/main/java/org/sopt/and/data/datasource/remote/AuthRemoteDataSource.kt b/app/src/main/java/org/sopt/and/data/datasource/remote/AuthRemoteDataSource.kt
index 357a4a8..962ff63 100644
--- a/app/src/main/java/org/sopt/and/data/datasource/remote/AuthRemoteDataSource.kt
+++ b/app/src/main/java/org/sopt/and/data/datasource/remote/AuthRemoteDataSource.kt
@@ -5,9 +5,10 @@ import org.sopt.and.data.model.request.RequestUserRegisterDto
 import org.sopt.and.data.model.response.ResponseLoginTokenDto
 import org.sopt.and.data.model.response.ResponseRegisterNumberDto
 import org.sopt.and.presentation.util.BaseResponse
+import org.sopt.and.presentation.util.NullableBaseRespone
 
 interface AuthRemoteDataSource {
     suspend fun register(requestUserRegisterDto: RequestUserRegisterDto): BaseResponse<ResponseRegisterNumberDto>
 
-    suspend fun login(requestUserLoginDto: RequestUserLoginDto): BaseResponse<ResponseLoginTokenDto>
+    suspend fun login(requestUserLoginDto: RequestUserLoginDto): NullableBaseRespone<ResponseLoginTokenDto>
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/sopt/and/data/datasourceImpl/remote/AuthRemoteDataSourceImpl.kt b/app/src/main/java/org/sopt/and/data/datasourceImpl/remote/AuthRemoteDataSourceImpl.kt
index bbb00d6..2b5e768 100644
--- a/app/src/main/java/org/sopt/and/data/datasourceImpl/remote/AuthRemoteDataSourceImpl.kt
+++ b/app/src/main/java/org/sopt/and/data/datasourceImpl/remote/AuthRemoteDataSourceImpl.kt
@@ -7,6 +7,7 @@ import org.sopt.and.data.model.response.ResponseLoginTokenDto
 import org.sopt.and.data.model.response.ResponseRegisterNumberDto
 import org.sopt.and.data.service.AuthService
 import org.sopt.and.presentation.util.BaseResponse
+import org.sopt.and.presentation.util.NullableBaseRespone
 import javax.inject.Inject
 
 class AuthRemoteDataSourceImpl @Inject constructor(
@@ -15,6 +16,6 @@ class AuthRemoteDataSourceImpl @Inject constructor(
     override suspend fun register(requestUserRegisterDto: RequestUserRegisterDto): BaseResponse<ResponseRegisterNumberDto> =
         authService.postRegister(requestUserRegisterDto)
 
-    override suspend fun login(requestUserLoginDto: RequestUserLoginDto): BaseResponse<ResponseLoginTokenDto> =
+    override suspend fun login(requestUserLoginDto: RequestUserLoginDto): NullableBaseRespone<ResponseLoginTokenDto> =
         authService.postLogin(requestUserLoginDto)
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/sopt/and/data/repositoryImpl/AuthRepositoryImpl.kt b/app/src/main/java/org/sopt/and/data/repositoryImpl/AuthRepositoryImpl.kt
index 66c37ac..a441300 100644
--- a/app/src/main/java/org/sopt/and/data/repositoryImpl/AuthRepositoryImpl.kt
+++ b/app/src/main/java/org/sopt/and/data/repositoryImpl/AuthRepositoryImpl.kt
@@ -1,7 +1,9 @@
 package org.sopt.and.data.repositoryImpl
 
 import org.sopt.and.data.datasource.remote.AuthRemoteDataSource
+import org.sopt.and.domain.model.UserEntity
 import org.sopt.and.domain.model.UserIdEntity
+import org.sopt.and.domain.model.UserLoginEntity
 import org.sopt.and.domain.model.UserRegisterEntity
 import org.sopt.and.domain.repository.AuthRepository
 import javax.inject.Inject
@@ -13,4 +15,9 @@ class AuthRepositoryImpl @Inject constructor(
         runCatching {
             authRemoteDataSource.register(requestUserRegisterDto = userRegisterEntity.toRequestUserRegisterDto()).result.toUserIdEntity()
         }
+
+    override suspend fun postLogin(userLoginEntity: UserLoginEntity): Result<UserEntity> =
+        runCatching {
+            authRemoteDataSource.login(requestUserLoginDto = userLoginEntity.toRequestUserLoginDto()).result.toUserEntity()
+        }
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/sopt/and/data/service/AuthService.kt b/app/src/main/java/org/sopt/and/data/service/AuthService.kt
index d571cae..9495a1c 100644
--- a/app/src/main/java/org/sopt/and/data/service/AuthService.kt
+++ b/app/src/main/java/org/sopt/and/data/service/AuthService.kt
@@ -5,6 +5,7 @@ import org.sopt.and.data.model.request.RequestUserRegisterDto
 import org.sopt.and.data.model.response.ResponseLoginTokenDto
 import org.sopt.and.data.model.response.ResponseRegisterNumberDto
 import org.sopt.and.presentation.util.BaseResponse
+import org.sopt.and.presentation.util.NullableBaseRespone
 import retrofit2.http.Body
 import retrofit2.http.POST
 
@@ -17,7 +18,7 @@ interface AuthService {
     @POST("/$LOGIN")
     suspend fun postLogin(
         @Body body: RequestUserLoginDto
-    ): BaseResponse<ResponseLoginTokenDto>
+    ): NullableBaseRespone<ResponseLoginTokenDto>
 
     companion object {
         const val USER = "user"
diff --git a/app/src/main/java/org/sopt/and/di/UseCaseModule.kt b/app/src/main/java/org/sopt/and/di/UseCaseModule.kt
index 5ab8fd2..0570e8f 100644
--- a/app/src/main/java/org/sopt/and/di/UseCaseModule.kt
+++ b/app/src/main/java/org/sopt/and/di/UseCaseModule.kt
@@ -5,6 +5,7 @@ import dagger.Provides
 import dagger.hilt.InstallIn
 import dagger.hilt.components.SingletonComponent
 import org.sopt.and.domain.repository.AuthRepository
+import org.sopt.and.domain.usecase.PostUserLoginUseCase
 import org.sopt.and.domain.usecase.PostUserRegisterUseCase
 import javax.inject.Singleton
 
@@ -15,4 +16,9 @@ class UseCaseModule {
     @Singleton
     fun providesUserRegisterUseCase(authRepository: AuthRepository): PostUserRegisterUseCase =
         PostUserRegisterUseCase(authRepository = authRepository)
+
+    @Provides
+    @Singleton
+    fun providesUserLoginUseCase(authRepository: AuthRepository): PostUserLoginUseCase =
+        PostUserLoginUseCase(authRepository = authRepository)
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/sopt/and/domain/repository/AuthRepository.kt b/app/src/main/java/org/sopt/and/domain/repository/AuthRepository.kt
index a020801..e67ddd0 100644
--- a/app/src/main/java/org/sopt/and/domain/repository/AuthRepository.kt
+++ b/app/src/main/java/org/sopt/and/domain/repository/AuthRepository.kt
@@ -1,8 +1,11 @@
 package org.sopt.and.domain.repository
 
+import org.sopt.and.domain.model.UserEntity
 import org.sopt.and.domain.model.UserIdEntity
+import org.sopt.and.domain.model.UserLoginEntity
 import org.sopt.and.domain.model.UserRegisterEntity
 
 interface AuthRepository {
     suspend fun postRegister(userRegisterEntity: UserRegisterEntity): Result<UserIdEntity>
+    suspend fun postLogin(userLoginEntity: UserLoginEntity): Result<UserEntity>
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/sopt/and/domain/usecase/PostUserLoginUseCase.kt b/app/src/main/java/org/sopt/and/domain/usecase/PostUserLoginUseCase.kt
new file mode 100644
index 0000000..08931e0
--- /dev/null
+++ b/app/src/main/java/org/sopt/and/domain/usecase/PostUserLoginUseCase.kt
@@ -0,0 +1,12 @@
+package org.sopt.and.domain.usecase
+
+import org.sopt.and.domain.model.UserEntity
+import org.sopt.and.domain.model.UserLoginEntity
+import org.sopt.and.domain.repository.AuthRepository
+
+class PostUserLoginUseCase(
+    private val authRepository: AuthRepository
+) {
+    suspend operator fun invoke(userLoginEntity: UserLoginEntity): Result<UserEntity> =
+        authRepository.postLogin(userLoginEntity = userLoginEntity)
+}
\ No newline at end of file
diff --git a/app/src/main/java/org/sopt/and/presentation/ui/auth/login/LoginViewModel.kt b/app/src/main/java/org/sopt/and/presentation/ui/auth/login/LoginViewModel.kt
index 49d4626..b67ae76 100644
--- a/app/src/main/java/org/sopt/and/presentation/ui/auth/login/LoginViewModel.kt
+++ b/app/src/main/java/org/sopt/and/presentation/ui/auth/login/LoginViewModel.kt
@@ -2,12 +2,16 @@ package org.sopt.and.presentation.ui.auth.login
 
 import dagger.hilt.android.lifecycle.HiltViewModel
 import org.sopt.and.data.datasource.local.WaveLocalDataSource
+import org.sopt.and.domain.model.UserLoginEntity
+import org.sopt.and.domain.usecase.PostUserLoginUseCase
 import org.sopt.and.presentation.util.BaseViewModel
+import timber.log.Timber
 import javax.inject.Inject
 
 @HiltViewModel
 class LoginViewModel @Inject constructor(
-    private val localDataSource: WaveLocalDataSource
+    private val waveLocalDataStorage: WaveLocalDataSource,
+    private val postUserLoginUseCase: PostUserLoginUseCase
 ) : BaseViewModel<LoginContract.LoginEvent, LoginContract.LoginState, LoginContract.LoginEffect>() {
 
     override fun createInitialState(): LoginContract.LoginState {
@@ -20,8 +24,8 @@ class LoginViewModel @Inject constructor(
 
     override suspend fun handleEvent(event: LoginContract.LoginEvent) {
         when (event) {
-            is LoginContract.LoginEvent.EmailChanged -> {
-                setState(currentUiState.copy(email = event.email))
+            is LoginContract.LoginEvent.UsernameChanged -> {
+                setState(currentUiState.copy(username = event.username))
             }
 
             is LoginContract.LoginEvent.PasswordChanged -> {
@@ -33,10 +37,18 @@ class LoginViewModel @Inject constructor(
             }
 
             is LoginContract.LoginEvent.OnLoginBtnClicked -> {
-                if (checkIsUserEmail() && checkIsUserPassword()) {
+                postUserLoginUseCase(
+                    userLoginEntity = UserLoginEntity(
+                        username = currentUiState.username,
+                        userPassword = currentUiState.password
+                    )
+                ).onSuccess { user ->
+                    Timber.d("[로그인] 성공 -> $user")
                     setEffect(LoginContract.LoginEffect.ShowSuccessSnackBar(successMessage = event.successMessage))
+                    setAccessToken(user.accessToken)
                     setState(currentUiState.copy(loginStatus = LoginContract.LoginStatus.Success))
-                } else {
+                }.onFailure {
+                    Timber.d("[로그인] 실패 -> $it")
                     setEffect(LoginContract.LoginEffect.ShowFailSnackBar(failMessage = event.failMessage))
                     setState(currentUiState.copy(loginStatus = LoginContract.LoginStatus.Fail))
                 }
@@ -44,8 +56,10 @@ class LoginViewModel @Inject constructor(
         }
     }
 
-    private fun checkIsUserEmail(): Boolean = (currentUiState.email == localDataSource.userEmail)
-
-    private fun checkIsUserPassword(): Boolean =
-        (currentUiState.password == localDataSource.userPassword)
+    private fun setAccessToken(token: String) {
+        with(waveLocalDataStorage) {
+            accessToken = token
+            isLogin = true
+        }
+    }
 }
\ No newline at end of file