diff --git a/app/src/main/java/com/sopt/geonppang/data/datasource/remote/AuthDataSource.kt b/app/src/main/java/com/sopt/geonppang/data/datasource/remote/AuthDataSource.kt
index 2a5d73f4..c627b181 100644
--- a/app/src/main/java/com/sopt/geonppang/data/datasource/remote/AuthDataSource.kt
+++ b/app/src/main/java/com/sopt/geonppang/data/datasource/remote/AuthDataSource.kt
@@ -1,7 +1,9 @@
 package com.sopt.geonppang.data.datasource.remote
 
+import com.sopt.geonppang.data.model.request.RequestLogin
 import com.sopt.geonppang.data.model.request.RequestNicknameSetting
 import com.sopt.geonppang.data.model.request.RequestSignup
+import com.sopt.geonppang.data.model.response.ResponseLogin
 import com.sopt.geonppang.data.model.response.ResponseLogout
 import com.sopt.geonppang.data.model.response.ResponseNickNameSetting
 import com.sopt.geonppang.data.model.response.ResponseSignup
@@ -23,4 +25,5 @@ class AuthDataSource @Inject constructor(
     suspend fun logout(): ResponseLogout = authService.logout()
     suspend fun settingNickname(nickname: RequestNicknameSetting): ResponseNickNameSetting =
         authService.settingNickName(nickname)
+    suspend fun login(requestLogin: RequestLogin): Response<ResponseLogin> = authService.login(requestLogin)
 }
diff --git a/app/src/main/java/com/sopt/geonppang/data/model/request/RequestLogin.kt b/app/src/main/java/com/sopt/geonppang/data/model/request/RequestLogin.kt
new file mode 100644
index 00000000..5c9ca57d
--- /dev/null
+++ b/app/src/main/java/com/sopt/geonppang/data/model/request/RequestLogin.kt
@@ -0,0 +1,12 @@
+package com.sopt.geonppang.data.model.request
+
+import com.google.gson.annotations.SerializedName
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class RequestLogin(
+    @SerializedName("email")
+    val email: String?,
+    @SerializedName("password")
+    val password: String?,
+)
diff --git a/app/src/main/java/com/sopt/geonppang/data/model/response/ResponseLogin.kt b/app/src/main/java/com/sopt/geonppang/data/model/response/ResponseLogin.kt
new file mode 100644
index 00000000..a35894f4
--- /dev/null
+++ b/app/src/main/java/com/sopt/geonppang/data/model/response/ResponseLogin.kt
@@ -0,0 +1,14 @@
+package com.sopt.geonppang.data.model.response
+
+import com.google.gson.annotations.SerializedName
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class ResponseLogin(
+    @SerializedName("code")
+    val code: String,
+    @SerializedName("message")
+    val message: String,
+    @SerializedName("data")
+    val data: String?,
+)
diff --git a/app/src/main/java/com/sopt/geonppang/data/repository/AuthRepositoryImpl.kt b/app/src/main/java/com/sopt/geonppang/data/repository/AuthRepositoryImpl.kt
index 4a9aa601..76ccbb69 100644
--- a/app/src/main/java/com/sopt/geonppang/data/repository/AuthRepositoryImpl.kt
+++ b/app/src/main/java/com/sopt/geonppang/data/repository/AuthRepositoryImpl.kt
@@ -1,8 +1,10 @@
 package com.sopt.geonppang.data.repository
 
 import com.sopt.geonppang.data.datasource.remote.AuthDataSource
+import com.sopt.geonppang.data.model.request.RequestLogin
 import com.sopt.geonppang.data.model.request.RequestNicknameSetting
 import com.sopt.geonppang.data.model.request.RequestSignup
+import com.sopt.geonppang.data.model.response.ResponseLogin
 import com.sopt.geonppang.data.model.response.ResponseLogout
 import com.sopt.geonppang.data.model.response.ResponseNickNameSetting
 import com.sopt.geonppang.data.model.response.ResponseSignup
@@ -28,4 +30,7 @@ class AuthRepositoryImpl @Inject constructor(
 
     override suspend fun settingNickname(nickName: RequestNicknameSetting): Result<ResponseNickNameSetting> =
         runCatching { authDataSource.settingNickname(nickName) }
+
+    override suspend fun login(responseLogin: RequestLogin): Result<Response<ResponseLogin>> =
+        runCatching { authDataSource.login(responseLogin) }
 }
diff --git a/app/src/main/java/com/sopt/geonppang/data/service/AuthService.kt b/app/src/main/java/com/sopt/geonppang/data/service/AuthService.kt
index f446a6de..9cfdd68a 100644
--- a/app/src/main/java/com/sopt/geonppang/data/service/AuthService.kt
+++ b/app/src/main/java/com/sopt/geonppang/data/service/AuthService.kt
@@ -1,7 +1,9 @@
 package com.sopt.geonppang.data.service
 
+import com.sopt.geonppang.data.model.request.RequestLogin
 import com.sopt.geonppang.data.model.request.RequestNicknameSetting
 import com.sopt.geonppang.data.model.request.RequestSignup
+import com.sopt.geonppang.data.model.response.ResponseLogin
 import com.sopt.geonppang.data.model.response.ResponseLogout
 import com.sopt.geonppang.data.model.response.ResponseNickNameSetting
 import com.sopt.geonppang.data.model.response.ResponseSignup
@@ -25,6 +27,11 @@ interface AuthService {
     @POST("auth/logout")
     suspend fun logout(): ResponseLogout
 
+    @POST("auth/login")
+    suspend fun login(
+        @Body requestLogin: RequestLogin
+    ): Response<ResponseLogin>
+
     @POST("member/nickname")
     suspend fun settingNickName(
         @Body requestNicknameSetting: RequestNicknameSetting
diff --git a/app/src/main/java/com/sopt/geonppang/domain/repository/AuthRepository.kt b/app/src/main/java/com/sopt/geonppang/domain/repository/AuthRepository.kt
index a545fc81..d1054e4b 100644
--- a/app/src/main/java/com/sopt/geonppang/domain/repository/AuthRepository.kt
+++ b/app/src/main/java/com/sopt/geonppang/domain/repository/AuthRepository.kt
@@ -1,7 +1,9 @@
 package com.sopt.geonppang.domain.repository
 
+import com.sopt.geonppang.data.model.request.RequestLogin
 import com.sopt.geonppang.data.model.request.RequestNicknameSetting
 import com.sopt.geonppang.data.model.request.RequestSignup
+import com.sopt.geonppang.data.model.response.ResponseLogin
 import com.sopt.geonppang.data.model.response.ResponseLogout
 import com.sopt.geonppang.data.model.response.ResponseNickNameSetting
 import com.sopt.geonppang.data.model.response.ResponseSignup
@@ -17,4 +19,5 @@ interface AuthRepository {
     suspend fun withdraw(): Result<ResponseWithdraw>
     suspend fun logout(): Result<ResponseLogout>
     suspend fun settingNickname(nickName: RequestNicknameSetting): Result<ResponseNickNameSetting>
+    suspend fun login(requestLogin: RequestLogin): Result<Response<ResponseLogin>>
 }
diff --git a/app/src/main/java/com/sopt/geonppang/presentation/login/LogInViewModel.kt b/app/src/main/java/com/sopt/geonppang/presentation/login/LogInViewModel.kt
index 36b78e28..c1084f13 100644
--- a/app/src/main/java/com/sopt/geonppang/presentation/login/LogInViewModel.kt
+++ b/app/src/main/java/com/sopt/geonppang/presentation/login/LogInViewModel.kt
@@ -1,12 +1,56 @@
 package com.sopt.geonppang.presentation.login
 
-import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.sopt.geonppang.data.datasource.local.GPDataSource
+import com.sopt.geonppang.data.model.request.RequestLogin
+import com.sopt.geonppang.domain.repository.AuthRepository
 import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import timber.log.Timber
 import javax.inject.Inject
 
 @HiltViewModel
-class LogInViewModel @Inject constructor() : ViewModel() {
-    val loginEmail = MutableLiveData("")
-    val loginPassword = MutableLiveData("")
+class LogInViewModel @Inject constructor(
+    private val authRepository: AuthRepository,
+    private val gpDataSource: GPDataSource
+) : ViewModel() {
+    val loginEmail = MutableStateFlow("")
+    val loginPassword = MutableStateFlow("")
+    private val _loginState = MutableStateFlow<Boolean?>(null)
+    val loginState get() = _loginState.asStateFlow()
+
+    fun initLogin() {
+        _loginState.value = null
+    }
+
+    fun login() {
+        viewModelScope.launch {
+            authRepository.login(RequestLogin(loginEmail.value, loginPassword.value))
+                .onSuccess { loginResponse ->
+                    val responseHeader = loginResponse.headers()
+                    val accessToken = responseHeader[AUTHORIZATION].toString()
+                    if (loginResponse.code() == 200) {
+                        gpDataSource.accessToken = BEARER_PREFIX + accessToken
+                        gpDataSource.isLogin = true
+                        _loginState.value = true
+                    }
+                    if (loginResponse.code() == 400) {
+                        _loginState.value = false
+                    }
+                    if (loginResponse.code() == 500) {
+                        Timber.tag("서버 오류")
+                    }
+                }.onFailure { throwable ->
+                    Timber.tag("로그인 실패 on Failure").e(throwable.message)
+                }
+        }
+    }
+
+    companion object {
+        const val AUTHORIZATION = "Authorization"
+        const val BEARER_PREFIX = "Bearer "
+    }
 }
diff --git a/app/src/main/java/com/sopt/geonppang/presentation/login/LoginActivity.kt b/app/src/main/java/com/sopt/geonppang/presentation/login/LoginActivity.kt
index 0b2dc583..a6a026e7 100644
--- a/app/src/main/java/com/sopt/geonppang/presentation/login/LoginActivity.kt
+++ b/app/src/main/java/com/sopt/geonppang/presentation/login/LoginActivity.kt
@@ -3,12 +3,18 @@ package com.sopt.geonppang.presentation.login
 import android.content.Intent
 import android.os.Bundle
 import androidx.activity.viewModels
+import androidx.lifecycle.flowWithLifecycle
+import androidx.lifecycle.lifecycleScope
 import com.sopt.geonppang.R
+import com.sopt.geonppang.data.datasource.local.GPDataSource
 import com.sopt.geonppang.databinding.ActivityLoginBinding
 import com.sopt.geonppang.presentation.auth.SignUpActivity
+import com.sopt.geonppang.presentation.home.HomeFragment
 import com.sopt.geonppang.util.binding.BindingActivity
 import com.sopt.geonppang.util.extension.hideKeyboard
 import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
 
 @AndroidEntryPoint
 class LoginActivity :
@@ -19,7 +25,9 @@ class LoginActivity :
         binding.viewModel = viewModel
         binding.lifecycleOwner = this
 
+        autoLogin()
         addListener()
+        collectData()
     }
 
     private fun addListener() {
@@ -34,7 +42,43 @@ class LoginActivity :
         }
     }
 
+    private fun collectData() {
+        viewModel.loginState.flowWithLifecycle(lifecycle).onEach { loginState ->
+            when (loginState) {
+                true -> {
+                    moveToHome()
+                }
+
+                false -> {
+                    showLoginFailDialog()
+                    viewModel.initLogin()
+                }
+
+                else -> {}
+            }
+        }.launchIn(lifecycleScope)
+    }
+
+    private fun showLoginFailDialog() {
+        LoginFailBottomDialogFragment().show(supportFragmentManager, LOGIN_FAIL)
+    }
+
+    private fun moveToHome() {
+        startActivity(Intent(this, HomeFragment::class.java))
+        finish()
+    }
+
     private fun moveToSignup() {
         startActivity(Intent(this, SignUpActivity::class.java))
     }
+
+    private fun autoLogin() {
+        val gpDataSource = GPDataSource(this)
+        if (gpDataSource.isLogin)
+            moveToHome()
+    }
+
+    companion object {
+        const val LOGIN_FAIL = "loginFail"
+    }
 }
diff --git a/app/src/main/java/com/sopt/geonppang/presentation/login/LoginFailBottomDialogFragment.kt b/app/src/main/java/com/sopt/geonppang/presentation/login/LoginFailBottomDialogFragment.kt
new file mode 100644
index 00000000..9f9fe4bd
--- /dev/null
+++ b/app/src/main/java/com/sopt/geonppang/presentation/login/LoginFailBottomDialogFragment.kt
@@ -0,0 +1,23 @@
+package com.sopt.geonppang.presentation.login
+
+import android.os.Bundle
+import android.view.View
+import com.sopt.geonppang.R
+import com.sopt.geonppang.databinding.DialogBottomLoginFailBinding
+import com.sopt.geonppang.util.binding.BindingBottomSheetDialogFragment
+
+class LoginFailBottomDialogFragment :
+    BindingBottomSheetDialogFragment<DialogBottomLoginFailBinding>(R.layout.dialog_bottom_login_fail) {
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding.lifecycleOwner = this.viewLifecycleOwner
+
+        addListeners()
+    }
+
+    private fun addListeners() {
+        binding.btnLoginFailConfirm.setOnClickListener {
+            dismiss()
+        }
+    }
+}
diff --git a/app/src/main/res/layout/activity_login.xml b/app/src/main/res/layout/activity_login.xml
index abea69f2..8aa2a864 100644
--- a/app/src/main/res/layout/activity_login.xml
+++ b/app/src/main/res/layout/activity_login.xml
@@ -160,12 +160,13 @@
             android:layout_marginHorizontal="24dp"
             android:layout_marginTop="@dimen/spacing20"
             android:layout_marginBottom="24dp"
-            android:backgroundTint="@{viewModel.loginPassword.length() > 0 ? @color/main_2 : @color/gray_200}"
-            android:enabled="@{viewModel.loginPassword.length() > 0}"
+            android:backgroundTint="@{viewModel.loginPassword.length > 0 ? @color/main_2 : @color/gray_200}"
+            android:enabled="@{viewModel.loginPassword.length > 0}"
+            android:onClick="@{() -> viewModel.login()}"
             android:paddingVertical="18dp"
             android:text="@string/login_text_phrase"
             android:textAppearance="@style/TextAppearance.BodyM1"
-            android:textColor="@{viewModel.loginPassword.length() > 0 ? @color/white : @color/gray_400}"
+            android:textColor="@{viewModel.loginPassword.length > 0 ? @color/white : @color/gray_400}"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
diff --git a/app/src/main/res/layout/activity_signup_nickname.xml b/app/src/main/res/layout/activity_signup_nickname.xml
index e5d1302c..cb90f2e5 100644
--- a/app/src/main/res/layout/activity_signup_nickname.xml
+++ b/app/src/main/res/layout/activity_signup_nickname.xml
@@ -81,7 +81,7 @@
                 android:layout_marginTop="16dp"
                 android:text="@string/tv_nickname"
                 android:textAppearance="@style/TextAppearance.Subhead"
-                android:textColor="@{!viewModel.email.empty &amp; !viewModel.isValidEmail() ? @color/error : @color/gray_400}" />
+                android:textColor="@{!viewModel.nickname.empty &amp; !viewModel.isValidNickname() ? @color/error : @color/gray_400}" />
 
 
             <EditText
diff --git a/app/src/main/res/layout/dialog_bottom_login_fail.xml b/app/src/main/res/layout/dialog_bottom_login_fail.xml
index a468d97c..db7566bb 100644
--- a/app/src/main/res/layout/dialog_bottom_login_fail.xml
+++ b/app/src/main/res/layout/dialog_bottom_login_fail.xml
@@ -49,7 +49,7 @@
             app:layout_constraintTop_toBottomOf="@id/iv_review_writing_success" />
 
         <com.google.android.material.button.MaterialButton
-            android:id="@+id/btn_review_writing_success"
+            android:id="@+id/btn_login_fail_confirm"
             style="@style/Widget.FullButton.Basic"
             android:layout_width="0dp"
             android:layout_height="wrap_content"