diff --git a/domain/src/main/java/com/foke/together/domain/interactor/AppInitUseCase.kt b/domain/src/main/java/com/foke/together/domain/interactor/AppInitUseCase.kt
new file mode 100644
index 0000000..c43ce0c
--- /dev/null
+++ b/domain/src/main/java/com/foke/together/domain/interactor/AppInitUseCase.kt
@@ -0,0 +1,15 @@
+package com.foke.together.domain.interactor
+
+import kotlinx.coroutines.flow.firstOrNull
+import javax.inject.Inject
+
+class AppInitUseCase @Inject constructor(
+    private val getExternalCameraIPUseCase: GetExternalCameraIPUseCase,
+    private val setExternalCameraIPUseCase: SetExternalCameraIPUseCase,
+) {
+    suspend operator fun invoke() {
+        getExternalCameraIPUseCase().firstOrNull()?.run {
+            setExternalCameraIPUseCase(this)
+        }
+    }
+}
\ No newline at end of file
diff --git a/presenter/src/main/java/com/foke/together/presenter/screen/SettingScreen.kt b/presenter/src/main/java/com/foke/together/presenter/screen/SettingScreen.kt
index 3300098..9e50e9a 100644
--- a/presenter/src/main/java/com/foke/together/presenter/screen/SettingScreen.kt
+++ b/presenter/src/main/java/com/foke/together/presenter/screen/SettingScreen.kt
@@ -8,8 +8,6 @@ import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
-import androidx.compose.material.icons.automirrored.filled.FactCheck
-import androidx.compose.material.icons.filled.CheckCircle
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.material3.MaterialTheme
@@ -25,7 +23,6 @@ import com.foke.together.presenter.theme.FourCutTogetherTheme
 import androidx.hilt.navigation.compose.hiltViewModel
 import com.foke.together.domain.interactor.entity.CameraSourceType
 import com.foke.together.presenter.viewmodel.SettingViewModel
-import com.foke.together.util.AppPolicy
 import kotlinx.coroutines.flow.map
 
 private const val CameraSourceTypeError = -1
@@ -38,9 +35,6 @@ fun SettingScreen(
     val cameraSelectedIndex by remember {
         viewModel.cameraSourceType.map { CameraSourceType.entries.indexOf(it) }
     }.collectAsState(CameraSourceTypeError)
-    val cameraIPAddress by remember {
-        viewModel.cameraIPAddress.map { it.address }
-    }.collectAsState(initial = AppPolicy.DEFAULT_EXTERNAL_CAMERA_IP)
     val cameraTypeList = CameraSourceType.entries.map { it.name }
 
     FourCutTogetherTheme {
@@ -152,27 +146,13 @@ fun SettingScreen(
                     width = Dimension.wrapContent
                     height = Dimension.wrapContent
                 },
-                value = cameraIPAddress,
-                onValueChange = { viewModel.setCameraIPAddress(it) },
+                value = viewModel.cameraIPAddressState,
+                onValueChange = {
+                    viewModel.cameraIPAddressState = it
+                    viewModel.setCameraIPAddress(it)
+                },
                 label = { Text(text = "IP Address") },
             )
-            IconButton(
-                modifier = Modifier.constrainAs(IPButton){
-                    top.linkTo(IPAdrress.top)
-                    start.linkTo(IPAdrress.end)
-                    end.linkTo(parent.end)
-                    bottom.linkTo(IPAdrress.bottom)
-                    width = Dimension.wrapContent
-                    height = Dimension.fillToConstraints
-                },
-                onClick = popBackStack
-            ) {
-                Icon(
-                    imageVector = Icons.Filled.CheckCircle,
-                    contentDescription = "IPButton",
-                    tint = MaterialTheme.colorScheme.primary
-                )
-            }
         }
     }
 }
diff --git a/presenter/src/main/java/com/foke/together/presenter/viewmodel/HomeViewModel.kt b/presenter/src/main/java/com/foke/together/presenter/viewmodel/HomeViewModel.kt
index ea415f2..d561952 100644
--- a/presenter/src/main/java/com/foke/together/presenter/viewmodel/HomeViewModel.kt
+++ b/presenter/src/main/java/com/foke/together/presenter/viewmodel/HomeViewModel.kt
@@ -2,6 +2,7 @@ package com.foke.together.presenter.viewmodel
 
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
+import com.foke.together.domain.interactor.AppInitUseCase
 import com.foke.together.domain.interactor.web.GetCurrentUserInformationUseCase
 import com.foke.together.domain.interactor.web.SignInUseCase
 import com.foke.together.util.AppLog
@@ -15,11 +16,14 @@ import javax.inject.Inject
 class HomeViewModel @Inject constructor(
     @IODispatcher private val ioDispatcher: CoroutineDispatcher,
     private val signInUseCase: SignInUseCase,
-    private val getCurrentUserInformationUseCase: GetCurrentUserInformationUseCase
-
+    private val getCurrentUserInformationUseCase: GetCurrentUserInformationUseCase,
+    private val appInitUseCase: AppInitUseCase
 ): ViewModel() {
     init {
         viewModelScope.launch(ioDispatcher) {
+            // init external camera ip address
+            appInitUseCase()
+
             // TODO: this is test code. remove later
             signInUseCase(
                 "test@test.com",
diff --git a/presenter/src/main/java/com/foke/together/presenter/viewmodel/SettingViewModel.kt b/presenter/src/main/java/com/foke/together/presenter/viewmodel/SettingViewModel.kt
index a29c476..2fc48d0 100644
--- a/presenter/src/main/java/com/foke/together/presenter/viewmodel/SettingViewModel.kt
+++ b/presenter/src/main/java/com/foke/together/presenter/viewmodel/SettingViewModel.kt
@@ -1,25 +1,29 @@
 package com.foke.together.presenter.viewmodel
 
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.foke.together.domain.interactor.GetCameraSourceTypeUseCase
 import com.foke.together.domain.interactor.GetExternalCameraIPUseCase
-import com.foke.together.domain.interactor.InitExternalCameraIPUseCase
 import com.foke.together.domain.interactor.SetCameraSourceTypeUseCase
 import com.foke.together.domain.interactor.SetExternalCameraIPUseCase
 import com.foke.together.domain.interactor.entity.CameraSourceType
 import com.foke.together.domain.interactor.entity.ExternalCameraIP
 import com.foke.together.util.AppLog
+import com.foke.together.util.di.IODispatcher
 import dagger.hilt.android.lifecycle.HiltViewModel
-import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.flow.SharingStarted
-import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.flow.shareIn
 import kotlinx.coroutines.launch
 import javax.inject.Inject
 
 @HiltViewModel
 class SettingViewModel @Inject constructor(
+    @IODispatcher private val ioDispatcher: CoroutineDispatcher,
     getCameraSourceTypeUseCase: GetCameraSourceTypeUseCase,
     private val setCameraSourceTypeUseCase: SetCameraSourceTypeUseCase,
     getExternalCameraIPUseCase: GetExternalCameraIPUseCase,
@@ -30,13 +34,20 @@ class SettingViewModel @Inject constructor(
         started = SharingStarted.WhileSubscribed(5000),
         replay = 1
     )
-
-    // TODO: need to change usecase
     val cameraIPAddress = getExternalCameraIPUseCase().shareIn(
         scope = viewModelScope,
         started = SharingStarted.WhileSubscribed(5000),
         replay = 1
     )
+    var cameraIPAddressState by mutableStateOf("1234")
+
+    init {
+        viewModelScope.launch(ioDispatcher) {
+            cameraIPAddress.collectLatest {
+                cameraIPAddressState = it.address
+            }
+        }
+    }
 
     fun setCameraSourceType(index: Int){
         setCameraSourceType(CameraSourceType.entries[index])
@@ -51,7 +62,6 @@ class SettingViewModel @Inject constructor(
 
     fun setCameraIPAddress(address: String){
         viewModelScope.launch {
-            // TODO: add usecase
             setExternalCameraIPUseCase(ExternalCameraIP(address))
         }
     }