diff --git a/app/src/main/java/com/sopt/now/test/presentation/LoginActivity.kt b/app/src/main/java/com/sopt/now/test/presentation/LoginActivity.kt
deleted file mode 100644
index 8f767a0..0000000
--- a/app/src/main/java/com/sopt/now/test/presentation/LoginActivity.kt
+++ /dev/null
@@ -1,66 +0,0 @@
-package com.sopt.now.test.presentation
-
-import android.content.Intent
-import android.os.Bundle
-import androidx.activity.viewModels
-import androidx.appcompat.app.AppCompatActivity
-import com.sopt.now.databinding.ActivityLoginBinding
-import com.sopt.now.test.core.util.context.showToast
-import com.sopt.now.test.data.dto.request.RequestLoginDto
-
-class LoginActivity : AppCompatActivity() {
-
-    private val binding by lazy { ActivityLoginBinding.inflate(layoutInflater) }
-    private val loginViewModel by viewModels<LoginViewModel>()
-
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        setContentView(binding.root)
-
-        loginViewModel.initializeApiFactory(this)
-
-        initLoginBtnClickListener()
-        initPostLoginObserver()
-        initSignUpBtnClickListener()
-    }
-
-    // 로그인
-    private fun initLoginBtnClickListener() {
-        with(binding){
-            btnLogin.setOnClickListener {
-                loginViewModel.postLogin(RequestLoginDto(
-                    authenticationId = etLoginId.text.toString(),
-                    password = etLoginPw.text.toString()
-                ))
-            }
-        }
-    }
-
-    private fun initPostLoginObserver() {
-        loginViewModel.postLoginLiveData.observe(this) { response ->
-            if(response.isSuccess){
-                navigateToMain(response.message)
-            }
-            showToast(response.message)
-        }
-    }
-
-    // 메인 페이지로 이동
-    private fun navigateToMain(content: String) {
-        Intent(this, MainActivity::class.java).apply {
-            startActivity(this)
-            finish()
-        }
-        showToast(content)
-    }
-
-    // 회원가입 페이지로 이동
-    private fun initSignUpBtnClickListener() {
-        binding.tvSignUp.setOnClickListener {
-            Intent(this, SignUpActivity::class.java).apply {
-                startActivity(this)
-                finish()
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/app/src/main/java/com/sopt/now/test/presentation/login/LoginActivity.kt b/app/src/main/java/com/sopt/now/test/presentation/login/LoginActivity.kt
new file mode 100644
index 0000000..17ee1a2
--- /dev/null
+++ b/app/src/main/java/com/sopt/now/test/presentation/login/LoginActivity.kt
@@ -0,0 +1,92 @@
+package com.sopt.now.test.presentation.login
+
+import android.content.Intent
+import android.os.Bundle
+import androidx.activity.viewModels
+import androidx.appcompat.app.AppCompatActivity
+import com.sopt.now.R
+import com.sopt.now.databinding.ActivityLoginBinding
+import com.sopt.now.test.core.util.context.showToast
+import com.sopt.now.test.core.view.UiState
+import com.sopt.now.test.data.ApiFactory
+import com.sopt.now.test.data.UserPreference
+import com.sopt.now.test.data.dto.request.RequestLoginDto
+import com.sopt.now.test.presentation.MainActivity
+import com.sopt.now.test.presentation.signup.SignUpActivity
+import timber.log.Timber
+
+class LoginActivity : AppCompatActivity() {
+
+    private val binding by lazy { ActivityLoginBinding.inflate(layoutInflater) }
+    private val loginViewModel by viewModels<LoginViewModel>()
+    private lateinit var userPreference: UserPreference
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(binding.root)
+
+        initializeUserPreference()
+        initLoginBtnClickListener()
+        initPostLoginObserver()
+        initSignUpBtnClickListener()
+    }
+
+    // UserPreference 초기화
+    private fun initializeUserPreference() {
+        userPreference = UserPreference(this)
+        ApiFactory.initializeUserPreference(userPreference)
+    }
+
+    // 로그인
+    private fun initLoginBtnClickListener() {
+        with(binding) {
+            btnLogin.setOnClickListener {
+                loginViewModel.postLogin(getLoginRequestDto())
+            }
+        }
+    }
+
+    private fun getLoginRequestDto(): RequestLoginDto {
+        with(binding) {
+            val id = etLoginId.text.toString()
+            val password = etLoginPw.text.toString()
+            return RequestLoginDto(
+                authenticationId = id,
+                password = password
+            )
+        }
+    }
+
+    private fun initPostLoginObserver() {
+        loginViewModel.postLoginLiveData.observe(this) {
+            when (it) {
+                is UiState.Success -> {
+                    userPreference.getUserId()?.let {
+                        navigateToMain(it)
+                    }
+                }
+                is UiState.Failure -> showToast(it.errorMessage)
+                is UiState.Loading -> Timber.d(getString(R.string.message_loading))
+            }
+        }
+    }
+
+    // 메인 페이지로 이동
+    private fun navigateToMain(userId: String) {
+        Intent(this, MainActivity::class.java).apply {
+            startActivity(this)
+            finish()
+        }
+        showToast(getString(R.string.message_login_success, userId))
+    }
+
+    // 회원가입 페이지로 이동
+    private fun initSignUpBtnClickListener() {
+        binding.tvSignUp.setOnClickListener {
+            Intent(this, SignUpActivity::class.java).apply {
+                startActivity(this)
+                finish()
+            }
+        }
+    }
+}
\ No newline at end of file