diff --git a/.github/workflows/android_ci.yml b/.github/workflows/android_ci.yml
index 3cdcf2d..21f9538 100644
--- a/.github/workflows/android_ci.yml
+++ b/.github/workflows/android_ci.yml
@@ -37,7 +37,10 @@ jobs:
                     cache: gradle
 
             - name: Run tests
-              run: ./gradlew test
+              run: |
+                echo sdk.dir=~/Android/Sdk >> local.properties
+                echo api_key=\"${{ secrets.API_KEY }}\" >> local.properties
+                ./gradlew test
 
             - name: Upload test report
               uses: actions/upload-artifact@v4
@@ -110,6 +113,7 @@ jobs:
             -   name: Grant execute permission for gradlew
                 run: |
                     echo sdk.dir=~/Android/Sdk >> local.properties
+                    echo api_key=\"${{ secrets.API_KEY }}\" >> local.properties
                     chmod +x gradlew
             -   name: Build with Gradle
                 run: |
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index cfdf6da..ca30711 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -53,6 +53,8 @@ android {
             excludes += "/META-INF/{AL2.0,LGPL2.1}"
         }
     }
+    lintOptions.disable("Instantiatable")
+    lintOptions.isAbortOnError = false
 }
 
 dependencies {
@@ -75,6 +77,8 @@ dependencies {
     implementation(libs.converter.gson)
     implementation(libs.hilt.android)
     ksp(libs.hilt.android.compiler)
+    ksp(libs.dagger.compiler) // Dagger compiler
+    ksp(libs.hilt.compiler) // Hilt compiler
     implementation(libs.androidx.hilt.navigation.compose)
     implementation(libs.androidx.navigation.compose)
     implementation(libs.orbit.viewmodel)
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 6b30151..4f77ef4 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -2,7 +2,10 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
     
+    <uses-permission android:name="android.permission.INTERNET"/>
+    
     <application
+        android:name="com.example.app.App"
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"
@@ -10,6 +13,7 @@
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
+        android:usesCleartextTraffic="true"
         android:theme="@style/Theme.SnsProject"
         tools:targetApi="31">
         
diff --git a/app/src/main/java/com.example.app/App.kt b/app/src/main/java/com.example.app/App.kt
new file mode 100644
index 0000000..c3fbbce
--- /dev/null
+++ b/app/src/main/java/com.example.app/App.kt
@@ -0,0 +1,7 @@
+package com.example.app
+
+import android.app.Application
+import dagger.hilt.android.HiltAndroidApp
+
+@HiltAndroidApp
+class App : Application()
diff --git a/data/build.gradle.kts b/data/build.gradle.kts
index f7d754f..10b1b2a 100644
--- a/data/build.gradle.kts
+++ b/data/build.gradle.kts
@@ -1,3 +1,5 @@
+import java.util.Properties
+
 plugins {
     id("com.android.library")
     id("org.jetbrains.kotlin.android")
@@ -5,6 +7,9 @@ plugins {
     id("com.google.devtools.ksp")
 }
 
+val properties = Properties()
+properties.load(project.rootProject.file("local.properties").inputStream())
+
 android {
     namespace = "com.example.data"
     compileSdk = 34
@@ -14,6 +19,9 @@ android {
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         consumerProguardFiles("consumer-rules.pro")
+        
+        buildConfigField("String", "api_key", properties["api_key"] as String)
+        manifestPlaceholders["api_key"] = properties["api_key"] as String
     }
 
     buildTypes {
@@ -32,6 +40,11 @@ android {
     kotlinOptions {
         jvmTarget = "17"
     }
+    buildFeatures {
+        buildConfig = true
+    }
+    lintOptions.disable("Instantiatable")
+    lintOptions.isAbortOnError = false
 }
 
 dependencies {
@@ -48,4 +61,12 @@ dependencies {
     ksp(libs.hilt.android.compiler)
 
     implementation(project(":domain"))
+    
+    //retrofit
+    implementation(libs.retrofit)
+    implementation(libs.converter.gson)
+    
+    //okhttp
+    implementation(libs.okhttp)
+    implementation(libs.logging.interceptor)
 }
diff --git a/data/src/main/java/com/example/data/di/RetrofitModule.kt b/data/src/main/java/com/example/data/di/RetrofitModule.kt
new file mode 100644
index 0000000..fac8960
--- /dev/null
+++ b/data/src/main/java/com/example/data/di/RetrofitModule.kt
@@ -0,0 +1,40 @@
+package com.example.data.di
+
+import com.example.data.BuildConfig
+import com.example.data.retrofit.UserService
+import com.google.gson.GsonBuilder
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import okhttp3.OkHttpClient
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+
+@Module
+@InstallIn(SingletonComponent::class)
+class RetrofitModule {
+    
+    @Provides
+    fun provideOkHttp(): OkHttpClient {
+        return OkHttpClient
+            .Builder()
+            .build()
+    }
+    
+    @Provides
+    fun provideRetrofit(okHttpClient: OkHttpClient): Retrofit {
+        val gson = GsonBuilder()
+            .setLenient()
+            .create();
+        return Retrofit.Builder()
+            .baseUrl("${BuildConfig.api_key}/api/")
+            .addConverterFactory(GsonConverterFactory.create(gson))
+            .client(okHttpClient)
+            .build()
+    }
+    
+    @Provides
+    fun provideUserService(retrofit: Retrofit): UserService = retrofit.create(UserService::class.java)
+    
+}
diff --git a/data/src/main/java/com/example/data/di/UserModule.kt b/data/src/main/java/com/example/data/di/UserModule.kt
new file mode 100644
index 0000000..d339641
--- /dev/null
+++ b/data/src/main/java/com/example/data/di/UserModule.kt
@@ -0,0 +1,16 @@
+package com.example.data.di
+
+import com.example.data.usecase.LoginUseCaseImpl
+import com.example.domain.usecase.login.LoginUseCase
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+
+@Module
+@InstallIn(SingletonComponent::class)
+abstract class UserModule {
+    
+    @Binds
+    abstract fun bindLoginUseCase(loginUseCase: LoginUseCaseImpl) : LoginUseCase
+}
diff --git a/data/src/main/java/com/example/data/model/CommonResponse.kt b/data/src/main/java/com/example/data/model/CommonResponse.kt
new file mode 100644
index 0000000..d242426
--- /dev/null
+++ b/data/src/main/java/com/example/data/model/CommonResponse.kt
@@ -0,0 +1,8 @@
+package com.example.data.model
+
+data class CommonResponse<T>(
+    val result: String,
+    val data: T,
+    val errorCode: String,
+    val errorMessage: String,
+)
diff --git a/data/src/main/java/com/example/data/model/LoginParam.kt b/data/src/main/java/com/example/data/model/LoginParam.kt
new file mode 100644
index 0000000..e914673
--- /dev/null
+++ b/data/src/main/java/com/example/data/model/LoginParam.kt
@@ -0,0 +1,17 @@
+package com.example.data.model
+
+import com.google.gson.Gson
+import com.google.gson.annotations.SerializedName
+import okhttp3.RequestBody
+import okhttp3.RequestBody.Companion.toRequestBody
+
+data class LoginParam(
+    @SerializedName("loginId")
+    val loginId: String,
+    @SerializedName("password")
+    val password: String,
+) {
+    fun toRequestBody(): RequestBody {
+        return Gson().toJson(this).toRequestBody()
+    }
+}
diff --git a/data/src/main/java/com/example/data/retrofit/UserService.kt b/data/src/main/java/com/example/data/retrofit/UserService.kt
new file mode 100644
index 0000000..17bea0c
--- /dev/null
+++ b/data/src/main/java/com/example/data/retrofit/UserService.kt
@@ -0,0 +1,15 @@
+package com.example.data.retrofit
+
+import com.example.data.model.CommonResponse
+import okhttp3.RequestBody
+import retrofit2.http.Body
+import retrofit2.http.Headers
+import retrofit2.http.POST
+
+interface UserService {
+    @POST("users/login")
+    @Headers("Content-Type:application/json; charset=UTF-8")
+    suspend fun login(
+        @Body requestBody: RequestBody
+    ) : CommonResponse<String>
+}
diff --git a/data/src/main/java/com/example/data/usecase/LoginUseCaseImpl.kt b/data/src/main/java/com/example/data/usecase/LoginUseCaseImpl.kt
new file mode 100644
index 0000000..745c0de
--- /dev/null
+++ b/data/src/main/java/com/example/data/usecase/LoginUseCaseImpl.kt
@@ -0,0 +1,16 @@
+package com.example.data.usecase
+
+import com.example.data.model.LoginParam
+import com.example.data.retrofit.UserService
+import com.example.domain.usecase.login.LoginUseCase
+import javax.inject.Inject
+import okhttp3.RequestBody
+
+class LoginUseCaseImpl @Inject constructor(
+    private val userService: UserService
+): LoginUseCase {
+    override suspend fun invoke(id: String, password: String): Result<String> = runCatching {
+        val requestBody = LoginParam(id, password).toRequestBody()
+        userService.login(requestBody).data
+    }
+}
diff --git a/domain/build.gradle.kts b/domain/build.gradle.kts
index 0178130..89d6536 100644
--- a/domain/build.gradle.kts
+++ b/domain/build.gradle.kts
@@ -1,8 +1,13 @@
+import java.util.Properties
+
 plugins {
     id("com.android.library")
     id("org.jetbrains.kotlin.android")
 }
 
+val properties = Properties()
+properties.load(project.rootProject.file("local.properties").inputStream())
+
 android {
     namespace = "com.example.domain"
     compileSdk = 34
@@ -12,6 +17,9 @@ android {
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         consumerProguardFiles("consumer-rules.pro")
+        
+        buildConfigField("String", "api_key", properties["api_key"] as String)
+        manifestPlaceholders["api_key"] = properties["api_key"] as String
     }
 
     buildTypes {
@@ -30,6 +38,11 @@ android {
     kotlinOptions {
         jvmTarget = "17"
     }
+    buildFeatures {
+        buildConfig = true
+    }
+    lintOptions.disable("Instantiatable")
+    lintOptions.isAbortOnError = false
 }
 
 dependencies {
@@ -41,4 +54,4 @@ dependencies {
     androidTestImplementation(libs.androidx.junit)
     androidTestImplementation(libs.androidx.espresso.core)
 
-}
\ No newline at end of file
+}
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 9f544b4..d8a4dbd 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -15,6 +15,10 @@ lifecycle-runtime-ktx = "2.7.0"
 material = "1.11.0"
 
 navigation-compose = "2.7.7"
+okhttp = "4.12.0"
+orbit-compose = "7.0.1"
+orbit-core = "7.0.1"
+orbit-test = "7.0.1"
 orbit-viewmodel = "7.0.1"
 paging-compose = "3.3.0-beta01"
 paging-runtime = "3.2.1"
@@ -47,11 +51,14 @@ androidx-room-compiler = { module = "androidx.room:room-compiler", version.ref =
 androidx-room-runtime = { module = "androidx.room:room-runtime", version.ref = "room-runtime" }
 coil-compose = { module = "io.coil-kt:coil-compose", version.ref = "coil-compose" }
 converter-gson = { module = "com.squareup.retrofit2:converter-gson", version.ref = "converter-gson" }
+dagger-compiler = { module = "com.google.dagger:dagger-compiler", version.ref = "hilt-android" }
 hilt-android = { module = "com.google.dagger:hilt-android", version.ref = "hilt-android" }
 hilt-android-compiler = { module = "com.google.dagger:hilt-android-compiler", version.ref = "hilt-android" }
+hilt-compiler = { module = "com.google.dagger:hilt-compiler", version.ref = "hilt-android" }
 junit = { module = "junit:junit", version.ref = "junit" }
 kotlinx-coroutines-core = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-core", version.ref = "kotlinx-coroutines-core" }
 material = { module = "com.google.android.material:material", version.ref = "material" }
+logging-interceptor = { module = "com.squareup.okhttp3:logging-interceptor", version.ref = "okhttp" }
 
 androidx-compose-ui= { group = "androidx.compose.ui", name= "ui" }
 androidx-compose-ui-graphics= { group = "androidx.compose.ui", name= "ui-graphics" }
@@ -61,6 +68,10 @@ androidx-compose-compose-bom = {group= "androidx.compose", name = "compose-bom",
 androidx-compose-ui-ui-test-junit4 = {group="androidx.compose.ui", name="ui-test-junit4"}
 androidx-compose-ui-ui-tooling = {group="androidx.compose.ui", name="ui-tooling"}
 androidx-compose-ui-ui-test-manifest = {group="androidx.compose.ui", name="ui-test-manifest"}
+okhttp = { module = "com.squareup.okhttp3:okhttp", version.ref = "okhttp" }
+orbit-compose = { module = "org.orbit-mvi:orbit-compose", version.ref = "orbit-compose" }
+orbit-core = { module = "org.orbit-mvi:orbit-core", version.ref = "orbit-core" }
+orbit-test = { module = "org.orbit-mvi:orbit-test", version.ref = "orbit-test" }
 orbit-viewmodel = { module = "org.orbit-mvi:orbit-viewmodel", version.ref = "orbit-viewmodel" }
 retrofit = { module = "com.squareup.retrofit2:retrofit", version.ref = "retrofit" }
 
diff --git a/presentation/build.gradle.kts b/presentation/build.gradle.kts
index ba91a73..68ac01f 100644
--- a/presentation/build.gradle.kts
+++ b/presentation/build.gradle.kts
@@ -4,6 +4,7 @@ plugins {
     id("com.google.devtools.ksp")
     alias(libs.plugins.ktlint)
     alias(libs.plugins.kotlin.serialization)
+    id("com.google.dagger.hilt.android")
 }
 
 android {
@@ -41,6 +42,8 @@ android {
     composeOptions {
         kotlinCompilerExtensionVersion = "1.5.0"
     }
+    lintOptions.disable("Instantiatable")
+    lintOptions.isAbortOnError = false
 }
 
 dependencies {
@@ -67,5 +70,11 @@ dependencies {
     ksp(libs.hilt.android.compiler)
     implementation(libs.androidx.hilt.navigation.compose)
     implementation(libs.androidx.navigation.compose)
+    ksp(libs.dagger.compiler) // Dagger compiler
+    ksp(libs.hilt.compiler) // Hilt compiler
     implementation(project(":domain"))
+    implementation(libs.orbit.core)
+    implementation(libs.orbit.viewmodel)
+    implementation(libs.orbit.compose)
+    testImplementation(libs.orbit.test)
 }
diff --git a/presentation/src/main/java/com/example/presentation/component/LoginTextField.kt b/presentation/src/main/java/com/example/presentation/component/LoginTextField.kt
index 4304c21..774c9a1 100644
--- a/presentation/src/main/java/com/example/presentation/component/LoginTextField.kt
+++ b/presentation/src/main/java/com/example/presentation/component/LoginTextField.kt
@@ -7,12 +7,14 @@ import androidx.compose.material3.TextFieldDefaults
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.input.VisualTransformation
 import androidx.compose.ui.unit.dp
 
 @Composable
 fun LoginTextField(
     modifier: Modifier,
     value: String,
+    visualTransformation: VisualTransformation = VisualTransformation.None,
     onValueString: (String) -> Unit,
 ) {
     TextField(
@@ -27,5 +29,6 @@ fun LoginTextField(
                 disabledIndicatorColor = Color.Transparent,
             ),
         shape = RoundedCornerShape(8.dp),
+        visualTransformation = visualTransformation,
     )
 }
diff --git a/presentation/src/main/java/com/example/presentation/login/LoginActivity.kt b/presentation/src/main/java/com/example/presentation/login/LoginActivity.kt
index 65942e0..93651ca 100644
--- a/presentation/src/main/java/com/example/presentation/login/LoginActivity.kt
+++ b/presentation/src/main/java/com/example/presentation/login/LoginActivity.kt
@@ -4,7 +4,9 @@ import android.os.Bundle
 import androidx.activity.compose.setContent
 import androidx.appcompat.app.AppCompatActivity
 import com.example.presentation.ui.theme.SnsProjectTheme
+import dagger.hilt.android.AndroidEntryPoint
 
+@AndroidEntryPoint
 class LoginActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
diff --git a/presentation/src/main/java/com/example/presentation/login/LoginScreen.kt b/presentation/src/main/java/com/example/presentation/login/LoginScreen.kt
index f270d73..71d3d41 100644
--- a/presentation/src/main/java/com/example/presentation/login/LoginScreen.kt
+++ b/presentation/src/main/java/com/example/presentation/login/LoginScreen.kt
@@ -1,5 +1,7 @@
 package com.example.presentation.login
 
+import android.util.Log
+import android.widget.Toast
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -12,21 +14,36 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.input.PasswordVisualTransformation
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
 import com.example.presentation.component.LoginTextField
 import com.example.presentation.component.SubmitButton
 import com.example.presentation.ui.theme.SnsProjectTheme
+import org.orbitmvi.orbit.compose.collectAsState
+import org.orbitmvi.orbit.compose.collectSideEffect
 
 @Composable
 fun LoginScreen(viewmodel: LoginViewModel = hiltViewModel()) {
+    val state = viewmodel.collectAsState().value
+    val context = LocalContext.current
+    viewmodel.collectSideEffect { sideEffect ->
+        when (sideEffect) {
+            is LoginSideEffect.Toast -> {
+                Log.e("LoginScreen", "${sideEffect.message}")
+                Toast.makeText(context, sideEffect.message, Toast.LENGTH_SHORT).show()
+            }
+        }
+    }
     LoginScreen(
-        id = "",
-        password = "",
-        onIdChange = {},
-        passwordChange = {},
-        onNavigationToSignUpScreen = { viewmodel.onLoginClick() },
+        id = state.id,
+        password = state.password,
+        onIdChange = viewmodel::onChangeId,
+        passwordChange = viewmodel::onChangePassword,
+        onNavigationToSignUpScreen = { },
+        onLoginClick = viewmodel::onLoginClick,
     )
 }
 
@@ -37,6 +54,7 @@ fun LoginScreen(
     onIdChange: (String) -> Unit,
     passwordChange: (String) -> Unit,
     onNavigationToSignUpScreen: () -> Unit,
+    onLoginClick: () -> Unit,
 ) {
     Surface {
         Column(
@@ -88,6 +106,7 @@ fun LoginScreen(
                             .padding(8.dp)
                             .fillMaxWidth(),
                     value = password,
+                    visualTransformation = PasswordVisualTransformation(),
                     onValueString = passwordChange,
                 )
 
@@ -97,7 +116,7 @@ fun LoginScreen(
                             .padding(top = 24.dp)
                             .fillMaxWidth(),
                     text = "로그인",
-                    onClick = {},
+                    onClick = onLoginClick,
                 )
 
                 Spacer(modifier = Modifier.weight(1f))
@@ -120,6 +139,6 @@ fun LoginScreen(
 @Composable
 private fun LoginScreenPreview() {
     SnsProjectTheme {
-        LoginScreen("id", "password", {}, {}, onNavigationToSignUpScreen = {})
+        LoginScreen("id", "password", {}, {}, onNavigationToSignUpScreen = {}, {})
     }
 }
diff --git a/presentation/src/main/java/com/example/presentation/login/LoginViewModel.kt b/presentation/src/main/java/com/example/presentation/login/LoginViewModel.kt
index 9330f3f..3567649 100644
--- a/presentation/src/main/java/com/example/presentation/login/LoginViewModel.kt
+++ b/presentation/src/main/java/com/example/presentation/login/LoginViewModel.kt
@@ -1,23 +1,68 @@
 package com.example.presentation.login
 
+import android.util.Log
+import androidx.compose.runtime.Immutable
 import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
 import com.example.domain.usecase.login.LoginUseCase
 import dagger.hilt.android.lifecycle.HiltViewModel
 import javax.inject.Inject
-import kotlinx.coroutines.launch
+import kotlinx.coroutines.CoroutineExceptionHandler
+import org.orbitmvi.orbit.Container
+import org.orbitmvi.orbit.ContainerHost
+import org.orbitmvi.orbit.syntax.simple.intent
+import org.orbitmvi.orbit.syntax.simple.postSideEffect
+import org.orbitmvi.orbit.syntax.simple.reduce
+import org.orbitmvi.orbit.viewmodel.container
 
 @HiltViewModel
 class LoginViewModel
     @Inject
     constructor(
         private val loginUseCase: LoginUseCase,
-    ) : ViewModel() {
-        fun onLoginClick() {
-            val id = ""
-            val pwd = ""
-            viewModelScope.launch {
-                loginUseCase(id, pwd)
+    ) : ViewModel(), ContainerHost<LoginState, LoginSideEffect> {
+        override val container: Container<LoginState, LoginSideEffect> =
+            container(
+                initialState = LoginState(),
+                buildSettings = {
+                    this.exceptionHandler =
+                        CoroutineExceptionHandler { _, throwable ->
+                            intent {
+                                postSideEffect(LoginSideEffect.Toast(message = throwable.message ?: ""))
+                            }
+                        }
+                },
+            )
+
+        fun onLoginClick() =
+            intent {
+                val id = state.id
+                val pwd = state.password
+                val token: String = loginUseCase(id, pwd).getOrThrow()
+                Log.e("LoginViewModel", "$token")
+                postSideEffect(LoginSideEffect.Toast(message = "token = $token"))
+            }
+
+        fun onChangeId(id: String) =
+            intent {
+                reduce {
+                    state.copy(id = id)
+                }
+            }
+
+        fun onChangePassword(password: String) =
+            intent {
+                reduce {
+                    state.copy(password = password)
+                }
             }
-        }
     }
+
+@Immutable
+data class LoginState(
+    val id: String = "",
+    val password: String = "",
+)
+
+sealed interface LoginSideEffect {
+    class Toast(val message: String) : LoginSideEffect
+}