diff --git a/app/build.gradle b/app/build.gradle
index f0da93e..0fe8785 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -70,4 +70,7 @@ dependencies {
     // define any required OkHttp artifacts without version
     implementation("com.squareup.okhttp3:okhttp")
     implementation("com.squareup.okhttp3:logging-interceptor")
+
+    // kotlinx 라이브러리
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.9'
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/sopt/dosopttemplate/AuthService.kt b/app/src/main/java/org/sopt/dosopttemplate/AuthService.kt
index b9efbd1..5e4dc7d 100644
--- a/app/src/main/java/org/sopt/dosopttemplate/AuthService.kt
+++ b/app/src/main/java/org/sopt/dosopttemplate/AuthService.kt
@@ -9,6 +9,7 @@ import org.sopt.dosopttemplate.data.ResponseMemberCheckDto
 import org.sopt.dosopttemplate.data.ResponseMemberDto
 import org.sopt.dosopttemplate.data.ResponseSignUpDto
 import retrofit2.Call
+import retrofit2.Response
 import retrofit2.http.Body
 import retrofit2.http.GET
 import retrofit2.http.POST
@@ -16,14 +17,14 @@ import retrofit2.http.Query
 
 interface AuthService {
     @POST("api/v1/members")
-    fun signup(
+    suspend fun signup(
         @Body request: RequestSignUpDto,
-    ):Call<ResponseSignUpDto> // 응답이 왓을 때 Callback으로 불려질 타입
+    ):Response<ResponseSignUpDto> // 응답이 왓을 때 Callback으로 불려질 타입
 
     @POST("api/v1/members/sign-in")
-    fun login(
+    suspend fun login(
         @Body request: RequestLoginDto,
-    ): Call<ResponseLoginDto>
+    ): Response<ResponseLoginDto>
 
     @GET("api/v1/members/{memberId}")
     fun memberInfo(
diff --git a/app/src/main/java/org/sopt/dosopttemplate/AuthViewModel.kt b/app/src/main/java/org/sopt/dosopttemplate/AuthViewModel.kt
new file mode 100644
index 0000000..2379602
--- /dev/null
+++ b/app/src/main/java/org/sopt/dosopttemplate/AuthViewModel.kt
@@ -0,0 +1,56 @@
+package org.sopt.dosopttemplate
+
+import android.provider.ContactsContract.CommonDataKinds.Nickname
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import org.sopt.dosopttemplate.ServicePool.authService
+import org.sopt.dosopttemplate.data.RequestLoginDto
+import org.sopt.dosopttemplate.data.RequestSignUpDto
+
+class AuthViewModel : ViewModel() {
+
+    // UI State 사용
+    private val _loginState = MutableStateFlow<LoginState>(LoginState.Loading)
+    val loginState: StateFlow<LoginState> = _loginState.asStateFlow()
+
+    private val _signUpState = MutableStateFlow<SignUpState>(SignUpState.Loading)
+    val signUpState: StateFlow<SignUpState> = _signUpState.asStateFlow()
+
+    fun login(id: String, password: String) {
+        viewModelScope.launch {
+            kotlin.runCatching {
+                val response = authService.login(RequestLoginDto(id, password))
+                response.body()
+            }.onSuccess {
+                if(it != null){
+                    _loginState.value = LoginState.Success(it)
+                } else{
+                    _loginState.value = LoginState.Error
+                }
+            }.onFailure {
+                _loginState.value = LoginState.Error
+            }
+        }
+    }
+
+    fun signUp(id: String, password: String, nickname: String){
+        viewModelScope.launch {
+            kotlin.runCatching {
+                val response = authService.signup(RequestSignUpDto(id, password, nickname))
+                response.body()
+            }.onSuccess {
+                if(it!=null) {
+                    _signUpState.value = SignUpState.Success(it)
+                }else{
+                    _signUpState. value = SignUpState.Error
+                }
+            }.onFailure {
+                _signUpState.value = SignUpState.Error
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/org/sopt/dosopttemplate/LoginActivity.kt b/app/src/main/java/org/sopt/dosopttemplate/LoginActivity.kt
index d199ba4..43578b6 100644
--- a/app/src/main/java/org/sopt/dosopttemplate/LoginActivity.kt
+++ b/app/src/main/java/org/sopt/dosopttemplate/LoginActivity.kt
@@ -2,19 +2,17 @@ package org.sopt.dosopttemplate
 
 import android.content.Intent
 import android.os.Bundle
-import android.util.Log
+import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
-import org.sopt.dosopttemplate.ServicePool.authService
-import org.sopt.dosopttemplate.Utils.UserInfo
+import androidx.lifecycle.lifecycleScope
+import kotlinx.coroutines.flow.collect
+import kotlinx.coroutines.launch
 import org.sopt.dosopttemplate.Utils.showToast
-import org.sopt.dosopttemplate.data.RequestLoginDto
-import org.sopt.dosopttemplate.data.ResponseLoginDto
 import org.sopt.dosopttemplate.databinding.ActivityLoginBinding
-import retrofit2.Call
-import retrofit2.Response
 
 class LoginActivity : AppCompatActivity() {
     private lateinit var binding: ActivityLoginBinding
+    private val authViewModel by viewModels<AuthViewModel>()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -22,6 +20,7 @@ class LoginActivity : AppCompatActivity() {
         setContentView(binding.root)
 
         signup()
+        observeLoginResult()
         login()
     }
 
@@ -32,7 +31,12 @@ class LoginActivity : AppCompatActivity() {
             val id = binding.etLoginIdIdHint.text.toString()
             val pw = binding.etLoginIdPwHint.text.toString()
 
-            // Request 요청 : RequestLoginDto body 담아주기
+            authViewModel.login(
+                id = id,
+                password = pw
+            )
+
+            /*// Request 요청 : RequestLoginDto body 담아주기
             authService.login(RequestLoginDto(id, pw))
                 // enqueue : 비동기 방식으로 네트워크 요청 보내고, 결과를 받아 알맞게 처리
                 // Callback 인터페이스를 구현한 객체를 전달
@@ -67,12 +71,31 @@ class LoginActivity : AppCompatActivity() {
                         showToast("네트워크 오류 발생")
                     }
                 }
-                )
+                )*/
+        }
+    }
+
+    private fun observeLoginResult() {
+        lifecycleScope.launch {
+            authViewModel.loginState.collect{ loginState ->
+                when(loginState){
+                    is LoginState.Success -> {
+                        showToast("로그인 성공")
+                        startActivity(Intent(this@LoginActivity, HomeActivity::class.java))
+                    }
+                    is LoginState.Error -> {
+                        showToast("로그인 실패")
+                    }
+                    is LoginState.Loading -> {
+                        showToast("로그인 중")
+                    }
+                }
+            }
         }
     }
 
     // 회원가입 버튼 클릭 시
-    private fun signup(){
+    private fun signup() {
         // 회원가입 페이지로 이동
         binding.btnLoginIdSignUp.setOnClickListener {
             // Intent 실행
diff --git a/app/src/main/java/org/sopt/dosopttemplate/LoginState.kt b/app/src/main/java/org/sopt/dosopttemplate/LoginState.kt
new file mode 100644
index 0000000..3f813dc
--- /dev/null
+++ b/app/src/main/java/org/sopt/dosopttemplate/LoginState.kt
@@ -0,0 +1,9 @@
+package org.sopt.dosopttemplate
+
+import org.sopt.dosopttemplate.data.ResponseLoginDto
+
+sealed class LoginState{
+    object Loading : LoginState()
+    data class Success(val data: ResponseLoginDto) : LoginState()
+    object Error : LoginState()
+}
diff --git a/app/src/main/java/org/sopt/dosopttemplate/SignUpActivity.kt b/app/src/main/java/org/sopt/dosopttemplate/SignUpActivity.kt
index 279ecd2..e1428f7 100644
--- a/app/src/main/java/org/sopt/dosopttemplate/SignUpActivity.kt
+++ b/app/src/main/java/org/sopt/dosopttemplate/SignUpActivity.kt
@@ -3,9 +3,13 @@ package org.sopt.dosopttemplate
 import android.content.Intent
 import android.os.Bundle
 import android.util.Log
+import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.lifecycleScope
 import com.google.android.material.datepicker.MaterialDatePicker
 import com.google.android.material.snackbar.Snackbar
+import kotlinx.coroutines.flow.collect
+import kotlinx.coroutines.launch
 import org.sopt.dosopttemplate.ServicePool.authService
 import org.sopt.dosopttemplate.Utils.showToast
 import org.sopt.dosopttemplate.data.RequestSignUpDto
@@ -22,6 +26,7 @@ import kotlin.properties.Delegates
 class SignUpActivity : AppCompatActivity() {
     lateinit var binding: ActivitySignUpBinding
     private var available by Delegates.notNull<Boolean>()
+    private val authViewModel by viewModels<AuthViewModel>()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -30,6 +35,7 @@ class SignUpActivity : AppCompatActivity() {
 
         birth()
         signup()
+        observeSignUpResult()
     }
 
     // 생일 정보 입력
@@ -116,39 +122,32 @@ class SignUpActivity : AppCompatActivity() {
             if (available) {
                 showToast("중복된 아이디입니다.")
             } else if (testResult && !available) { // 조건이 적절하고 중복된 아이디가 아닌 경우
-                authService.signup(RequestSignUpDto(id, pw, nickname))
-                    .enqueue(object : retrofit2.Callback<ResponseSignUpDto> {
-                        override fun onResponse(
-                            call: Call<ResponseSignUpDto>,
-                            response: Response<ResponseSignUpDto>
-                        ) {
-                            when (response.code()) {
-                                201 -> {
-                                    // 회원가입 성공
-                                    showToast("회원가입 성공!")
-                                    val intent =
-                                        Intent(this@SignUpActivity, LoginActivity::class.java)
-                                    startActivity(intent)
-                                }
-
-                                400 -> {
-                                    // 회원가입 실패
-                                    showToast("회원가입에 실패했습니다.")
-                                }
-
-                                else -> {
-                                    showToast("서버 에러 발생")
-                                }
-                            }
-                        }
-
-                        override fun onFailure(call: Call<ResponseSignUpDto>, t: Throwable) {
-                            showToast("네트워크 에러 발생")
-                        }
-                    })
+                authViewModel.signUp(
+                    id = id,
+                    password = pw,
+                    nickname = nickname
+                )
             } else {
                 showToast("올바른 정보를 입력해주세요.")
             }
         }
     }
+
+    private fun observeSignUpResult(){
+        lifecycleScope.launch {
+            authViewModel.signUpState.collect{ SignUpState ->
+                when(SignUpState){
+                    is SignUpState.Success -> {
+                        showToast("회원가입 성공")
+                    }
+                    is SignUpState.Error -> {
+                        showToast("회원가입 실패")
+                    }
+                    is SignUpState.Loading -> {
+                        showToast("회원가입 중")
+                    }
+                }
+            }
+        }
+    }
 }
diff --git a/app/src/main/java/org/sopt/dosopttemplate/SignUpState.kt b/app/src/main/java/org/sopt/dosopttemplate/SignUpState.kt
new file mode 100644
index 0000000..f783532
--- /dev/null
+++ b/app/src/main/java/org/sopt/dosopttemplate/SignUpState.kt
@@ -0,0 +1,9 @@
+package org.sopt.dosopttemplate
+
+import org.sopt.dosopttemplate.data.ResponseSignUpDto
+
+sealed class SignUpState {
+    object Loading : SignUpState()
+    data class Success(val data: ResponseSignUpDto) : SignUpState()
+    object Error : SignUpState()
+}