diff --git a/app/src/main/java/com/sopt/now/presentation/ui/auth/signin/SignInActivity.kt b/app/src/main/java/com/sopt/now/presentation/ui/auth/signin/SignInActivity.kt
index c02ed3e..9a361b4 100644
--- a/app/src/main/java/com/sopt/now/presentation/ui/auth/signin/SignInActivity.kt
+++ b/app/src/main/java/com/sopt/now/presentation/ui/auth/signin/SignInActivity.kt
@@ -3,6 +3,7 @@ package com.sopt.now.presentation.ui.auth.signin
 import android.content.Intent
 import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.ViewModelProvider
 import com.sopt.now.R
 import com.sopt.now.data.User
 import com.sopt.now.databinding.ActivitySigninBinding
@@ -14,19 +15,34 @@ import com.sopt.now.presentation.utils.showToast
 
 class SignInActivity : AppCompatActivity() {
     private lateinit var binding: ActivitySigninBinding
-    private var user: User? = null
+    private lateinit var viewModel: SignInViewModel
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         binding = ActivitySigninBinding.inflate(layoutInflater)
         setContentView(binding.root)
+        viewModel = ViewModelProvider(this)[SignInViewModel::class.java]
 
         getUserInfo()
+        setupObservers()
         onSignInClicked()
         onSignUpClicked()
     }
 
     private fun getUserInfo() {
-        user = intent.getSafeParcelable(KeyStorage.USER_INFO, User::class.java)
+        val user = intent.getSafeParcelable(KeyStorage.USER_INFO, User::class.java)
+        viewModel.setUser(user)
+    }
+
+    private fun setupObservers() {
+        viewModel.signInState.observe(this) { isSuccess ->
+            if (isSuccess) {
+                showToast(this, getString(R.string.signin_signin_success))
+                navigateToMain()
+            } else {
+                showToast(this, getString(R.string.signin_signin_failure))
+            }
+        }
     }
 
     private fun onSignInClicked() {
@@ -34,13 +50,7 @@ class SignInActivity : AppCompatActivity() {
             with(binding) {
                 val inputId = etSignInId.text.toString()
                 val inputPassword = etSignInPw.text.toString()
-
-                if (inputId == user?.id && inputPassword == user?.password) {
-                    showToast(this@SignInActivity, getString(R.string.signin_signin_success))
-                    navigateToMain()
-                } else {
-                    showToast(this@SignInActivity, getString(R.string.signin_signin_failure))
-                }
+                viewModel.validateSignIn(inputId, inputPassword)
             }
         }
     }
@@ -53,7 +63,7 @@ class SignInActivity : AppCompatActivity() {
 
     private fun navigateToMain() {
         val intent = Intent(this@SignInActivity, MainActivity::class.java)
-        intent.putExtra(KeyStorage.USER_INFO, user)
+        intent.putExtra(KeyStorage.USER_INFO, viewModel.user.value)
         startActivity(intent)
     }
 
diff --git a/app/src/main/java/com/sopt/now/presentation/ui/auth/signin/SignInViewModel.kt b/app/src/main/java/com/sopt/now/presentation/ui/auth/signin/SignInViewModel.kt
new file mode 100644
index 0000000..60d2754
--- /dev/null
+++ b/app/src/main/java/com/sopt/now/presentation/ui/auth/signin/SignInViewModel.kt
@@ -0,0 +1,26 @@
+package com.sopt.now.presentation.ui.auth.signin
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import com.sopt.now.data.User
+
+class SignInViewModel : ViewModel() {
+    private val _user = MutableLiveData<User?>()
+    val user: LiveData<User?> = _user
+
+    private val _signInState = MutableLiveData<Boolean>()
+    val signInState: LiveData<Boolean> = _signInState
+
+    fun setUser(user: User?) {
+        _user.value = user
+    }
+
+    fun validateSignIn(inputId: String, inputPassword: String) {
+        if (inputId == _user.value?.id && inputPassword == _user.value?.password) {
+            _signInState.value = true
+        } else {
+            _signInState.value = false
+        }
+    }
+}