diff --git a/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/LoginActivity.kt b/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/LoginActivity.kt
index 32db049..d7e0689 100644
--- a/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/LoginActivity.kt
+++ b/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/LoginActivity.kt
@@ -8,7 +8,11 @@ import androidx.activity.OnBackPressedCallback
 import androidx.activity.result.ActivityResultLauncher
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.activity.viewModels
+import androidx.lifecycle.flowWithLifecycle
+import androidx.lifecycle.lifecycleScope
 import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
 import org.sopt.dosopttemplate.R
 import org.sopt.dosopttemplate.data.datasource.local.DoSoptStorage
 import org.sopt.dosopttemplate.data.entity.auth.AuthInfo
@@ -73,7 +77,7 @@ class LoginActivity : BindingActivity<ActivityLoginBinding>(R.layout.activity_lo
     }
 
     private fun observeLogin() {
-        loginViewModel.signInResult.observe(this) { uiState ->
+        loginViewModel.signInState.flowWithLifecycle(lifecycle).onEach { uiState ->
             when (uiState) {
                 is UiState.Success -> {
                     setAutoLogin(uiState.data)
@@ -86,7 +90,7 @@ class LoginActivity : BindingActivity<ActivityLoginBinding>(R.layout.activity_lo
 
                 else -> {}
             }
-        }
+        }.launchIn(lifecycleScope)
     }
 
     private fun setAutoLogin(signData: AuthInfo) {
diff --git a/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/LoginViewModel.kt b/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/LoginViewModel.kt
index 6988c8b..bdd3aa5 100644
--- a/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/LoginViewModel.kt
+++ b/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/LoginViewModel.kt
@@ -1,14 +1,15 @@
 package org.sopt.dosopttemplate.presentation.auth
 
-import androidx.lifecycle.LiveData
-import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.launch
 import org.sopt.dosopttemplate.data.entity.auth.AuthInfo
 import org.sopt.dosopttemplate.data.repository.auth.AuthRepository
 import org.sopt.dosopttemplate.util.UiState
+import timber.log.Timber
 import javax.inject.Inject
 
 @HiltViewModel
@@ -16,8 +17,8 @@ class LoginViewModel @Inject constructor(
     private val authRepository: AuthRepository,
 ) : ViewModel() {
 
-    private val _signInResult = MutableLiveData<UiState<AuthInfo>>()
-    val signInResult: LiveData<UiState<AuthInfo>> = _signInResult
+    private val _signInState = MutableStateFlow<UiState<AuthInfo>>(UiState.Loading)
+    val signInState get() = _signInState.asStateFlow()
 
     fun signIn(username: String, password: String) {
         viewModelScope.launch {
@@ -25,9 +26,9 @@ class LoginViewModel @Inject constructor(
                 username = username,
                 password = password,
             ).onSuccess { authInfo ->
-                _signInResult.value = UiState.Success(authInfo)
+                _signInState.value = UiState.Success(authInfo)
             }.onFailure { throwable ->
-                _signInResult.value = throwable.message?.let { UiState.Failure(it) }
+                Timber.e(throwable.message)
             }
         }
     }
diff --git a/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/SignUpActivity.kt b/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/SignUpActivity.kt
index 6ef9897..52a39ea 100644
--- a/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/SignUpActivity.kt
+++ b/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/SignUpActivity.kt
@@ -6,7 +6,11 @@ import android.view.View.INVISIBLE
 import android.view.View.VISIBLE
 import androidx.activity.viewModels
 import androidx.core.content.ContextCompat
+import androidx.lifecycle.flowWithLifecycle
+import androidx.lifecycle.lifecycleScope
 import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
 import org.sopt.dosopttemplate.R
 import org.sopt.dosopttemplate.data.datasource.local.DoSoptStorage
 import org.sopt.dosopttemplate.databinding.ActivitySignupBinding
@@ -76,7 +80,7 @@ class SignUpActivity : BindingActivity<ActivitySignupBinding>(R.layout.activity_
     }
 
     private fun observeSignUp() {
-        signUpViewModel.signUpResult.observe(this) { uiState ->
+        signUpViewModel.signUpState.flowWithLifecycle(lifecycle).onEach { uiState ->
             when (uiState) {
                 is UiState.Success -> {
                     val intent = Intent(this, LoginActivity::class.java)
@@ -91,7 +95,7 @@ class SignUpActivity : BindingActivity<ActivitySignupBinding>(R.layout.activity_
 
                 else -> {}
             }
-        }
+        }.launchIn(lifecycleScope)
     }
 
     private fun getSignUpInfo() {
diff --git a/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/SignUpViewModel.kt b/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/SignUpViewModel.kt
index 8e807b0..4d27479 100644
--- a/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/SignUpViewModel.kt
+++ b/app/src/main/java/org/sopt/dosopttemplate/presentation/auth/SignUpViewModel.kt
@@ -1,16 +1,18 @@
 package org.sopt.dosopttemplate.presentation.auth
 
-import androidx.lifecycle.LiveData
 import androidx.lifecycle.MediatorLiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.map
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.launch
 import org.sopt.dosopttemplate.data.repository.auth.AuthRepository
 import org.sopt.dosopttemplate.util.UiState
 import org.sopt.dosopttemplate.util.extension.addSourceList
+import timber.log.Timber
 import java.util.regex.Pattern
 import javax.inject.Inject
 
@@ -19,8 +21,8 @@ class SignUpViewModel @Inject constructor(
     private val authRepository: AuthRepository,
 ) : ViewModel() {
 
-    private val _signUpResult = MutableLiveData<UiState<Boolean>>()
-    val signUpResult: LiveData<UiState<Boolean>> = _signUpResult
+    private val _signUpState = MutableStateFlow<UiState<Boolean>>(UiState.Loading)
+    val signUpState get() = _signUpState.asStateFlow()
 
     val id = MutableLiveData("")
     val pw = MutableLiveData("")
@@ -41,10 +43,10 @@ class SignUpViewModel @Inject constructor(
                 username = id.value.toString(),
                 password = pw.value.toString(),
                 nickname = nickname.value.toString()
-            ).onSuccess { _signUpResult.value = UiState.Success(true) }
+            ).onSuccess { _signUpState.value = UiState.Success(true) }
 
                 .onFailure { throwable ->
-                    _signUpResult.value = throwable.message?.let { UiState.Failure(it) }
+                    Timber.e(throwable.message)
                 }
         }
     }