diff --git a/app/src/main/java/org/android/go/sopt/presentation/login/LoginActivity.kt b/app/src/main/java/org/android/go/sopt/presentation/login/LoginActivity.kt
index 5f09c22..a8d7593 100644
--- a/app/src/main/java/org/android/go/sopt/presentation/login/LoginActivity.kt
+++ b/app/src/main/java/org/android/go/sopt/presentation/login/LoginActivity.kt
@@ -14,8 +14,9 @@ import org.android.go.sopt.util.binding.BindingActivity
 import org.android.go.sopt.util.extension.setOnSingleClickListener
 import org.android.go.sopt.util.extension.showSnackbar
 import org.android.go.sopt.util.extension.showToast
-import org.android.go.sopt.util.state.LocalUiState.Failure
-import org.android.go.sopt.util.state.LocalUiState.Success
+import org.android.go.sopt.util.state.RemoteUiState.Error
+import org.android.go.sopt.util.state.RemoteUiState.Failure
+import org.android.go.sopt.util.state.RemoteUiState.Success
 
 @AndroidEntryPoint
 class LoginActivity : BindingActivity<ActivityLoginBinding>(R.layout.activity_login) {
@@ -47,6 +48,7 @@ class LoginActivity : BindingActivity<ActivityLoginBinding>(R.layout.activity_lo
             when (state) {
                 is Success -> navigateToMainScreen()
                 is Failure -> showSnackbar(binding.root, getString(R.string.wrong_input_msg))
+                is Error -> showSnackbar(binding.root, getString(R.string.unknown_error_msg))
             }
         }
     }
diff --git a/app/src/main/java/org/android/go/sopt/presentation/login/LoginViewModel.kt b/app/src/main/java/org/android/go/sopt/presentation/login/LoginViewModel.kt
index e49b601..fcaa003 100644
--- a/app/src/main/java/org/android/go/sopt/presentation/login/LoginViewModel.kt
+++ b/app/src/main/java/org/android/go/sopt/presentation/login/LoginViewModel.kt
@@ -9,9 +9,10 @@ import kotlinx.coroutines.launch
 import org.android.go.sopt.data.entity.remote.request.RequestPostSignInDto
 import org.android.go.sopt.domain.model.User
 import org.android.go.sopt.domain.repository.AuthRepository
-import org.android.go.sopt.util.state.LocalUiState
-import org.android.go.sopt.util.state.LocalUiState.Failure
-import org.android.go.sopt.util.state.LocalUiState.Success
+import org.android.go.sopt.util.state.RemoteUiState
+import org.android.go.sopt.util.state.RemoteUiState.Error
+import org.android.go.sopt.util.state.RemoteUiState.Failure
+import org.android.go.sopt.util.state.RemoteUiState.Success
 import retrofit2.HttpException
 import timber.log.Timber
 import javax.inject.Inject
@@ -20,8 +21,8 @@ import javax.inject.Inject
 class LoginViewModel @Inject constructor(
     private val authRepository: AuthRepository,
 ) : ViewModel() {
-    private val _loginState = MutableLiveData<LocalUiState>()
-    val loginState: LiveData<LocalUiState>
+    private val _loginState = MutableLiveData<RemoteUiState>()
+    val loginState: LiveData<RemoteUiState>
         get() = _loginState
 
     val _id = MutableLiveData("")
@@ -38,7 +39,7 @@ class LoginViewModel @Inject constructor(
 
     private fun setupAutoLogin() {
         if (authRepository.getAutoLogin() && authRepository.getSignedUpUser() != null) {
-            _loginState.value = Success
+            _loginState.value = RemoteUiState.Success
         }
     }
 
@@ -71,9 +72,17 @@ class LoginViewModel @Inject constructor(
                 }
                 .onFailure { t ->
                     if (t is HttpException) {
+                        when (t.code()) {
+                            CODE_INVALID_INPUT -> _loginState.value = Failure(CODE_INVALID_INPUT)
+                            else -> _loginState.value = Error
+                        }
                         Timber.e("POST SIGNIN FAIL ${t.code()} : ${t.message()}")
                     }
                 }
         }
     }
+
+    companion object {
+        const val CODE_INVALID_INPUT = 400
+    }
 }
diff --git a/app/src/main/java/org/android/go/sopt/presentation/main/follower/FollowerFragment.kt b/app/src/main/java/org/android/go/sopt/presentation/main/follower/FollowerFragment.kt
index 1f54fa3..d63d7c6 100644
--- a/app/src/main/java/org/android/go/sopt/presentation/main/follower/FollowerFragment.kt
+++ b/app/src/main/java/org/android/go/sopt/presentation/main/follower/FollowerFragment.kt
@@ -10,6 +10,7 @@ import org.android.go.sopt.R
 import org.android.go.sopt.databinding.FragmentFollowerBinding
 import org.android.go.sopt.presentation.main.follower.FollowerAdapter.Companion.VIEW_TYPE_HEADER
 import org.android.go.sopt.util.binding.BindingFragment
+import org.android.go.sopt.util.extension.showSnackbar
 import org.android.go.sopt.util.state.RemoteUiState.Error
 import org.android.go.sopt.util.state.RemoteUiState.Failure
 import org.android.go.sopt.util.state.RemoteUiState.Success
@@ -51,8 +52,8 @@ class FollowerFragment : BindingFragment<FragmentFollowerBinding>(R.layout.fragm
         viewModel.getFollowerListState.observe(viewLifecycleOwner) { state ->
             when (state) {
                 is Success -> followerAdapter?.submitList(viewModel.followerList)
-                is Failure -> {}
-                is Error -> {}
+                is Failure -> requireContext().showSnackbar(binding.root, getString(R.string.follower_get_follower_list_null_msg))
+                is Error -> requireContext().showSnackbar(binding.root, getString(R.string.unknown_error_msg))
             }
         }
     }
diff --git a/app/src/main/java/org/android/go/sopt/presentation/main/follower/FollowerViewModel.kt b/app/src/main/java/org/android/go/sopt/presentation/main/follower/FollowerViewModel.kt
index 7c9690a..2a36681 100644
--- a/app/src/main/java/org/android/go/sopt/presentation/main/follower/FollowerViewModel.kt
+++ b/app/src/main/java/org/android/go/sopt/presentation/main/follower/FollowerViewModel.kt
@@ -10,6 +10,7 @@ import org.android.go.sopt.domain.model.Follower
 import org.android.go.sopt.domain.repository.FollowerRepository
 import org.android.go.sopt.util.state.RemoteUiState
 import org.android.go.sopt.util.state.RemoteUiState.Error
+import org.android.go.sopt.util.state.RemoteUiState.Failure
 import org.android.go.sopt.util.state.RemoteUiState.Success
 import retrofit2.HttpException
 import timber.log.Timber
@@ -36,14 +37,17 @@ class FollowerViewModel @Inject constructor(
         viewModelScope.launch {
             followerRepository.getFollowerList(1)
                 .onSuccess { response ->
-                    // TODO: followerList null 처리
+                    if (response.isEmpty()) {
+                        _getFollowerListState.value = Failure(null)
+                        return@onSuccess
+                    }
+
                     _followerList.value = response
                     _getFollowerListState.value = Success
                     Timber.d("GET FOLLOWER LIST SUCCESS : $response")
                 }
                 .onFailure { t ->
                     if (t is HttpException) {
-                        // TODO : failure 예외 처리
                         _getFollowerListState.value = Error
                         Timber.e("GET FOLLOWER LIST FAIL : ${t.message}")
                     }
diff --git a/app/src/main/res/layout/item_follower.xml b/app/src/main/res/layout/item_follower.xml
index a384a83..8c2fad0 100644
--- a/app/src/main/res/layout/item_follower.xml
+++ b/app/src/main/res/layout/item_follower.xml
@@ -14,6 +14,7 @@
         android:id="@+id/layout_item_follower"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:layout_marginTop="10dp"
         android:layout_marginBottom="30dp">
 
         <ImageView
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 96545d1..1beec43 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -53,6 +53,7 @@
 
     <!-- follower -->
     <string name="follower_header_title">Followers</string>
+    <string name="follower_get_follower_list_null_msg">팔로워가 존재하지 않습니다.</string>
 
     <!-- profile -->
     <string name="profile_name">이름 : %s</string>