diff --git a/app/src/main/java/com/sopt/now/test/data/BaseState.kt b/app/src/main/java/com/sopt/now/test/data/BaseState.kt
new file mode 100644
index 0000000..9ddd75b
--- /dev/null
+++ b/app/src/main/java/com/sopt/now/test/data/BaseState.kt
@@ -0,0 +1,6 @@
+package com.sopt.now.test.data
+
+data class BaseState(
+    val isSuccess: Boolean,
+    val message: String
+)
\ No newline at end of file
diff --git a/app/src/main/java/com/sopt/now/test/presentation/SignUpActivity.kt b/app/src/main/java/com/sopt/now/test/presentation/SignUpActivity.kt
index ce74a72..5c978fc 100644
--- a/app/src/main/java/com/sopt/now/test/presentation/SignUpActivity.kt
+++ b/app/src/main/java/com/sopt/now/test/presentation/SignUpActivity.kt
@@ -3,60 +3,56 @@ package com.sopt.now.test.presentation
 import android.content.Intent
 import android.os.Bundle
 import android.widget.Toast
+import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
 import com.sopt.now.databinding.ActivitySignUpBinding
-import com.sopt.now.test.data.UserData
+import com.sopt.now.test.data.dto.request.RequestSignUpDto
 
 class SignUpActivity : AppCompatActivity() {
 
-    private lateinit var binding: ActivitySignUpBinding
+    private val binding by lazy { ActivitySignUpBinding.inflate(layoutInflater) }
+    private val viewModel by viewModels<SignUpViewModel>()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        binding = ActivitySignUpBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
-        setupSignUpButton()
+        initViews()
+        initObserver()
     }
 
-    // 회원 가입
-    private fun setupSignUpButton() {
+    private fun initViews() {
         binding.btnSignUp.setOnClickListener {
-            with(binding) {
-                val userId = etSignUpId.text.toString()
-                val userPw = etSignUpPw.text.toString()
-                val userName = etSignUpName.text.toString()
-                val selfDescription = etSignUpDescription.text.toString()
-
-                val userData = UserData(userId, userPw, userName, selfDescription)
-                checkSignUp(userData)
-            }
+            viewModel.signUp(getSignUpRequestDto())
         }
     }
 
-    // 회원 가입 가능 여부 체크
-    private fun checkSignUp(userData: UserData) {
-        val isValidId = userData.userId.length in MIN_ID_LENGTH..MAX_ID_LENGTH
-        val isValidPw = userData.userPw.length in MIN_PW_LENGTH..MAX_PW_LENGTH
-        val isValidName = userData.userName.isBlank() // 공백으로만 이루어진 경우 판단
-
-        val message = when {
-            !isValidId -> "ID는 6~10 글자여야 합니다."
-            !isValidPw -> "Password는 8~12 글자여야 합니다."
-            isValidName -> "공백으로만 이루어진 닉네임은 불가합니다."
-            else -> {
-                moveToLogin(userData)
-                "회원가입 성공!"
+    private fun initObserver() {
+        viewModel.liveData.observe(this) { response ->
+            if (response.isSuccess) {
+                moveToLogin()
             }
+            showToast(response.message)
         }
-        showToast(message)
+    }
+
+    private fun getSignUpRequestDto(): RequestSignUpDto {
+        val id = binding.etSignUpId.text.toString()
+        val password = binding.etSignUpPw.text.toString()
+        val nickname = binding.etSignUpName.text.toString()
+        val phoneNumber = binding.etSignUpPhone.text.toString()
+        return RequestSignUpDto(
+            authenticationId = id,
+            password = password,
+            nickname = nickname,
+            phone = phoneNumber
+        )
     }
 
     // 로그인 페이지로 이동
-    private fun moveToLogin(userData: UserData) {
+    private fun moveToLogin() {
         Intent(this, LoginActivity::class.java).apply {
-            putExtra("userData", userData)
-            setResult(RESULT_OK, this)
+            startActivity(this)
             finish()
         }
     }
@@ -64,12 +60,4 @@ class SignUpActivity : AppCompatActivity() {
     private fun showToast(message: String) {
         Toast.makeText(this, message, Toast.LENGTH_SHORT).show()
     }
-
-    // 글자 수 제한
-    companion object {
-        private const val MIN_ID_LENGTH = 6
-        private const val MAX_ID_LENGTH = 10
-        private const val MIN_PW_LENGTH = 8
-        private const val MAX_PW_LENGTH = 12
-    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/sopt/now/test/presentation/SignUpViewModel.kt b/app/src/main/java/com/sopt/now/test/presentation/SignUpViewModel.kt
new file mode 100644
index 0000000..57ed9ec
--- /dev/null
+++ b/app/src/main/java/com/sopt/now/test/presentation/SignUpViewModel.kt
@@ -0,0 +1,59 @@
+package com.sopt.now.test.presentation
+
+import android.util.Log
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import com.google.gson.Gson
+import com.sopt.now.test.data.ServicePool
+import com.sopt.now.test.data.BaseState
+import com.sopt.now.test.data.dto.request.RequestSignUpDto
+import com.sopt.now.test.data.dto.response.ResponseAuthDto
+import retrofit2.Call
+import retrofit2.Callback
+import retrofit2.Response
+
+class SignUpViewModel : ViewModel() {
+    private val authService by lazy { ServicePool.authService }
+    val liveData = MutableLiveData<BaseState>()
+
+    fun signUp(request: RequestSignUpDto) {
+        authService.signUp(request).enqueue(object : Callback<ResponseAuthDto> {
+            override fun onResponse(
+                call: Call<ResponseAuthDto>,
+                response: Response<ResponseAuthDto>,
+            ) {
+                if (response.isSuccessful) {
+                    val data: ResponseAuthDto? = response.body()
+                    val userId = response.headers()["location"]
+                    liveData.value = BaseState(
+                        isSuccess = true,
+                        message = "회원가입 성공 유저의 ID는 $userId 입니다."
+                    )
+                    Log.d("SignUp", "data: $data, userId: $userId")
+                } else {
+                    val error = response.errorBody()?.string()
+                    val gson = Gson()
+                    try {
+                        val errorResponse = gson.fromJson(error, ResponseAuthDto::class.java)
+                        liveData.value = BaseState(
+                            isSuccess = false,
+                            message = "회원가입 실패: ${errorResponse.message}" // 에러 메시지 사용
+                        )
+                    } catch (e: Exception) {
+                        liveData.value = BaseState(
+                            isSuccess = false,
+                            message = "회원가입 실패: 에러 메시지 파싱 실패"
+                        )
+                    }
+                }
+            }
+
+            override fun onFailure(call: Call<ResponseAuthDto>, t: Throwable) {
+                liveData.value = BaseState(
+                    isSuccess = false,
+                    message = "서버 에러"
+                )
+            }
+        })
+    }
+}
\ No newline at end of file