diff --git a/NADA-iOS-forRelease/Resouces/Constants/Notification.swift b/NADA-iOS-forRelease/Resouces/Constants/Notification.swift
index fe6829fc..2ef63808 100644
--- a/NADA-iOS-forRelease/Resouces/Constants/Notification.swift
+++ b/NADA-iOS-forRelease/Resouces/Constants/Notification.swift
@@ -16,4 +16,6 @@ extension Notification.Name {
     static let dismissRequiredBottomSheet = Notification.Name("dismissRequiredBottomSheet")
     static let cancelImagePicker = Notification.Name("cancelImagePicker")
     static let presentCardShare = Notification.Name("presentCardShare")
+    static let passDataToGroup = Notification.Name("passDataToGroup")
+    static let passDataToDetail = Notification.Name("passDataToDetail")
 }
diff --git a/NADA-iOS-forRelease/Sources/ViewControllers/BottomSheet/SelectGroupBottomSheetViewController.swift b/NADA-iOS-forRelease/Sources/ViewControllers/BottomSheet/SelectGroupBottomSheetViewController.swift
index 41333c81..98d80f74 100644
--- a/NADA-iOS-forRelease/Sources/ViewControllers/BottomSheet/SelectGroupBottomSheetViewController.swift
+++ b/NADA-iOS-forRelease/Sources/ViewControllers/BottomSheet/SelectGroupBottomSheetViewController.swift
@@ -13,6 +13,8 @@ class SelectGroupBottomSheetViewController: CommonBottomSheetViewController {
     var cardDataModel: Card?
     var serverGroups: Groups?
     var selectedGroup = 0
+    var selectedGroupIndex = 0
+    var groupId: Int?
     enum Status {
         case detail
         case add
@@ -74,11 +76,11 @@ class SelectGroupBottomSheetViewController: CommonBottomSheetViewController {
     @objc func presentCardInfoViewController() {
         switch status {
         case .detail:
-            // TODO: 그룹 변경 서버통신
-            hideBottomSheetAndGoBack()
+            changeGroupWithAPI(request: ChangeGroupRequest(cardID: cardDataModel?.cardID ?? "",
+                                                           userID: UserDefaults.standard.string(forKey: Const.UserDefaults.userID) ?? "",
+                                                           groupID: groupId ?? 0,
+                                                           newGroupID: selectedGroup))
         case .add:
-            print(selectedGroup)
-//                     그룹 속 명함 추가 테스트
             cardAddInGroupWithAPI(cardRequest: CardAddInGroupRequest(cardId: cardDataModel?.cardID ?? "",
                                                                      userId: UserDefaults.standard.string(forKey: Const.UserDefaults.userID) ?? "",
                                                                      groupId: selectedGroup))
@@ -112,6 +114,7 @@ extension SelectGroupBottomSheetViewController: UIPickerViewDelegate, UIPickerVi
     
     func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
         selectedGroup = serverGroups?.groups[row].groupID ?? 0
+        selectedGroupIndex = row
         pickerView.reloadAllComponents()
     }
     
@@ -132,6 +135,9 @@ extension SelectGroupBottomSheetViewController {
                 guard let nextVC = UIStoryboard.init(name: Const.Storyboard.Name.cardDetail, bundle: nil).instantiateViewController(withIdentifier: Const.ViewController.Identifier.cardDetailViewController) as? CardDetailViewController else { return }
                 nextVC.status = .add
                 nextVC.cardDataModel = self.cardDataModel
+                nextVC.groupId = self.selectedGroup
+                nextVC.serverGroups = self.serverGroups
+                NotificationCenter.default.post(name: Notification.Name.passDataToGroup, object: self.selectedGroupIndex, userInfo: nil)
                 self.hideBottomSheetAndPresentVC(nextViewController: nextVC)
             case .requestErr(let message):
                 print("postCardAddInGroupWithAPI - requestErr", message)
@@ -145,4 +151,23 @@ extension SelectGroupBottomSheetViewController {
             }
         }
     }
+    
+    func changeGroupWithAPI(request: ChangeGroupRequest) {
+        GroupAPI.shared.changeCardGroup(request: request) { response in
+            switch response {
+            case .success:
+                NotificationCenter.default.post(name: Notification.Name.passDataToGroup, object: self.selectedGroupIndex, userInfo: nil)
+                NotificationCenter.default.post(name: Notification.Name.passDataToDetail, object: self.selectedGroup, userInfo: nil)
+                self.hideBottomSheetAndGoBack()
+            case .requestErr(let message):
+                print("changeGroupWithAPI - requestErr: \(message)")
+            case .pathErr:
+                print("changeGroupWithAPI - pathErr")
+            case .serverErr:
+                print("changeGroupWithAPI - serverErr")
+            case .networkFail:
+                print("changeGroupWithAPI - networkFail")
+            }
+        }
+    }
 }
diff --git a/NADA-iOS-forRelease/Sources/ViewControllers/CardCreation/CardCreationViewController.swift b/NADA-iOS-forRelease/Sources/ViewControllers/CardCreation/CardCreationViewController.swift
index aa5b731a..6f08d2e6 100644
--- a/NADA-iOS-forRelease/Sources/ViewControllers/CardCreation/CardCreationViewController.swift
+++ b/NADA-iOS-forRelease/Sources/ViewControllers/CardCreation/CardCreationViewController.swift
@@ -244,23 +244,6 @@ extension CardCreationViewController {
 //        }
 //    }
 
-    // TODO: - group 서버통신. 위치변경.
-//    func changeGroupWithAPI(request: ChangeGroupRequest) {
-//        GroupAPI.shared.changeCardGroup(request: request) { response in
-//            switch response {
-//            case .success:
-//                print("changeGroupWithAPI - success")
-//            case .requestErr(let message):
-//                print("changeGroupWithAPI - requestErr: \(message)")
-//            case .pathErr:
-//                print("changeGroupWithAPI - pathErr")
-//            case .serverErr:
-//                print("changeGroupWithAPI - serverErr")
-//            case .networkFail:
-//                print("changeGroupWithAPI - networkFail")
-//            }
-//        }
-//    }
     // TODO: - group 서버통신. 위치변경.
 //    func cardDeleteInGroupWithAPI(groupID: Int, cardID: String) {
 //        GroupAPI.shared.cardDeleteInGroup(groupID: groupID, cardID: cardID) { response in
diff --git a/NADA-iOS-forRelease/Sources/ViewControllers/CardDetail/CardDetailViewController.swift b/NADA-iOS-forRelease/Sources/ViewControllers/CardDetail/CardDetailViewController.swift
index 26dc4d2b..3458d668 100644
--- a/NADA-iOS-forRelease/Sources/ViewControllers/CardDetail/CardDetailViewController.swift
+++ b/NADA-iOS-forRelease/Sources/ViewControllers/CardDetail/CardDetailViewController.swift
@@ -44,6 +44,7 @@ class CardDetailViewController: UIViewController {
     
     private var isFront = true
     var status: Status = .group
+    var serverGroups: Groups?
     var groupId: Int?
     
     override func viewDidLoad() {
@@ -54,6 +55,9 @@ class CardDetailViewController: UIViewController {
         setGestureRecognizer()
     }
 
+    override func viewWillAppear(_ animated: Bool) {
+        NotificationCenter.default.addObserver(self, selector: #selector(didRecieveDataNotification(_:)), name: Notification.Name.passDataToDetail, object: nil)
+    }
 }
 
 extension CardDetailViewController {
@@ -94,6 +98,9 @@ extension CardDetailViewController {
                         .setTitle("그룹선택")
                         .setHeight(386)
             nextVC.status = .detail
+            nextVC.groupId = self.groupId
+            nextVC.serverGroups = self.serverGroups
+            nextVC.cardDataModel = self.cardDataModel
             nextVC.modalPresentationStyle = .overFullScreen
             self.present(nextVC, animated: false, completion: nil)
         })
@@ -142,6 +149,10 @@ extension CardDetailViewController {
     
     // MARK: - @objc Methods
     
+    @objc func didRecieveDataNotification(_ notification: Notification) {
+        groupId = notification.object as? Int ?? 0
+    }
+    
     @objc
     private func transitionCardWithAnimation(_ swipeGesture: UISwipeGestureRecognizer) {
         if isFront {
diff --git a/NADA-iOS-forRelease/Sources/ViewControllers/Group/GroupViewController.swift b/NADA-iOS-forRelease/Sources/ViewControllers/Group/GroupViewController.swift
index f2dacc1e..648ad438 100644
--- a/NADA-iOS-forRelease/Sources/ViewControllers/Group/GroupViewController.swift
+++ b/NADA-iOS-forRelease/Sources/ViewControllers/Group/GroupViewController.swift
@@ -66,6 +66,8 @@ class GroupViewController: UIViewController {
     var serverCardsWithBack: Card?
     var groupId: Int?
     
+    var selectedRow = 0
+    
     override func viewDidLoad() {
         super.viewDidLoad()
         registerCell()
@@ -73,7 +75,8 @@ class GroupViewController: UIViewController {
 //         그룹 삭제 서버 테스트
 //        groupDeleteWithAPI(groupID: 1)
 //         그룹 추가 서버 테스트
-//        groupAddWithAPI(groupRequest: GroupAddRequest(userId: "nada2", groupName: "대학교"))
+//        groupAddWithAPI(groupRequest: GroupAddRequest(userId: UserDefaults.standard.string(forKey: Const.UserDefaults.userID) ?? "",
+//                                                      groupName: "SOPT"))
 //         그룹 수정 서버 테스트
 //        groupEditWithAPI(groupRequest: GroupEditRequest(groupId: 5, groupName: "수정나다"))
 //         그룹 속 명함 조회 테스트
@@ -85,7 +88,8 @@ class GroupViewController: UIViewController {
     
     override func viewWillAppear(_ animated: Bool) {
         // 그룹 리스트 조회 서버 테스트
-//        groupListFetchWithAPI(userID: UserConst.UserDefaults.userID)
+        NotificationCenter.default.addObserver(self, selector: #selector(didRecieveDataNotification(_:)), name: Notification.Name.passDataToGroup, object: nil)
+        print("viewWillAppear")
         groupListFetchWithAPI(userID: UserDefaults.standard.string(forKey: Const.UserDefaults.userID) ?? "")
 
     }
@@ -107,6 +111,10 @@ extension GroupViewController {
         emptyView.isHidden = true
         navigationController?.navigationBar.isHidden = true
     }
+    
+    @objc func didRecieveDataNotification(_ notification: Notification) {
+        selectedRow = notification.object as? Int ?? 0
+    }
 }
 
 // MARK: - Network
@@ -119,10 +127,9 @@ extension GroupViewController {
                 if let group = data as? Groups {
                     self.serverGroups = group
                     self.groupCollectionView.reloadData()
-                    self.groupId = group.groups[0].groupID
+                    self.groupId = group.groups[self.selectedRow].groupID
                     if !group.groups.isEmpty {
-//                        self.cardListInGroupWithAPI(cardListInGroupRequest: CardListInGroupRequest(userId: "nada2", groupId: group.groups[0].groupID, offset: 0))
-                        self.cardListInGroupWithAPI(cardListInGroupRequest: CardListInGroupRequest(userId: UserDefaults.standard.string(forKey: Const.UserDefaults.userID) ?? "", groupId: group.groups[0].groupID, offset: 0))
+                        self.cardListInGroupWithAPI(cardListInGroupRequest: CardListInGroupRequest(userId: UserDefaults.standard.string(forKey: Const.UserDefaults.userID) ?? "", groupId: group.groups[self.selectedRow].groupID, offset: 0))
                     }
                 }
             case .requestErr(let message):
@@ -237,6 +244,7 @@ extension GroupViewController {
                                                 twoTmi: card.card.twoTmi,
                                                 threeTmi: card.card.threeTmi)
                     nextVC.groupId = self.groupId
+                    nextVC.serverGroups = self.serverGroups
                     self.navigationController?.pushViewController(nextVC, animated: true)
                 }
             case .requestErr(let message):
@@ -279,7 +287,7 @@ extension GroupViewController: UICollectionViewDataSource {
             
             groupCell.groupName.text = serverGroups?.groups[indexPath.row].groupName
             
-            if indexPath.row == 0 {
+            if indexPath.row == selectedRow {
                 collectionView.selectItem(at: indexPath, animated: true, scrollPosition: .init())
             }
             return groupCell
@@ -314,8 +322,12 @@ extension GroupViewController: UICollectionViewDataSource {
     func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
         switch collectionView {
         case groupCollectionView:
+            selectedRow = indexPath.row
             groupId = serverGroups?.groups[indexPath.row].groupID
-            cardListInGroupWithAPI(cardListInGroupRequest: CardListInGroupRequest(userId: "nada2", groupId: serverGroups?.groups[indexPath.row].groupID ?? 0, offset: 0))
+            cardListInGroupWithAPI(cardListInGroupRequest:
+                                    CardListInGroupRequest(userId: UserDefaults.standard.string(forKey: Const.UserDefaults.userID) ?? "",
+                                                           groupId: serverGroups?.groups[indexPath.row].groupID ?? 0,
+                                                           offset: 0))
         case cardsCollectionView:
             cardDetailFetchWithAPI(cardID: serverCards?.cards[indexPath.row].cardID ?? "")
         default: