diff --git a/SodaLive/Sources/Chat/Character/CharacterApi.swift b/SodaLive/Sources/Chat/Character/CharacterApi.swift
index 3ba1ec6..a4724f1 100644
--- a/SodaLive/Sources/Chat/Character/CharacterApi.swift
+++ b/SodaLive/Sources/Chat/Character/CharacterApi.swift
@@ -12,6 +12,7 @@ enum CharacterApi {
     case getCharacterHome
     case getCharacterDetail(characterId: Int)
     case getCharacterImageList(characterId: Int, page: Int, size: Int)
+    case getMyCharacterImageList(characterId: Int64, page: Int, size: Int)
 }
 
 extension CharacterApi: TargetType {
@@ -27,6 +28,9 @@ extension CharacterApi: TargetType {
             
         case .getCharacterImageList:
             return "/api/chat/character/image/list"
+            
+        case .getMyCharacterImageList:
+            return "/api/chat/character/image/list"
         }
     }
     
@@ -46,6 +50,16 @@ extension CharacterApi: TargetType {
                 ],
                 encoding: URLEncoding.queryString
             )
+            
+        case .getMyCharacterImageList(let characterId, let page, let size):
+            return .requestParameters(
+                parameters: [
+                    "characterId": characterId,
+                    "page": page,
+                    "size": size
+                ],
+                encoding: URLEncoding.queryString
+            )
         }
     }
     
diff --git a/SodaLive/Sources/Chat/Character/Detail/Gallery/CharacterDetailGalleryRepository.swift b/SodaLive/Sources/Chat/Character/Detail/Gallery/CharacterDetailGalleryRepository.swift
index e05fc95..d20387a 100644
--- a/SodaLive/Sources/Chat/Character/Detail/Gallery/CharacterDetailGalleryRepository.swift
+++ b/SodaLive/Sources/Chat/Character/Detail/Gallery/CharacterDetailGalleryRepository.swift
@@ -26,4 +26,18 @@ final class CharacterDetailGalleryRepository {
             )
         )
     }
+    
+    func getMyCharacterImageList(
+        characterId: Int64,
+        page: Int,
+        size: Int = 20
+    ) -> AnyPublisher<Response, MoyaError> {
+        return characterApi.requestPublisher(
+            .getMyCharacterImageList(
+                characterId: characterId,
+                page: page,
+                size: size
+            )
+        )
+    }
 }
diff --git a/SodaLive/Sources/Chat/Character/Detail/Gallery/CharacterDetailGalleryView.swift b/SodaLive/Sources/Chat/Character/Detail/Gallery/CharacterDetailGalleryView.swift
index 2f53aa3..0e13acc 100644
--- a/SodaLive/Sources/Chat/Character/Detail/Gallery/CharacterDetailGalleryView.swift
+++ b/SodaLive/Sources/Chat/Character/Detail/Gallery/CharacterDetailGalleryView.swift
@@ -10,7 +10,7 @@ import SwiftUI
 struct CharacterDetailGalleryView: View {
     @StateObject var viewModel = CharacterDetailGalleryViewModel()
     
-    private let columns = Array(repeating: GridItem(.flexible()), count: 3)
+    private let columns = Array(repeating: GridItem(.flexible(), spacing: 0), count: 3)
     let characterId: Int
     
     // 계산된 속성들
@@ -30,7 +30,7 @@ struct CharacterDetailGalleryView: View {
                 
                 // 갤러리 그리드
                 ScrollView {
-                    LazyVGrid(columns: columns, spacing: 2) {
+                    LazyVGrid(columns: columns, spacing: 0) {
                         ForEach(Array(viewModel.galleryItems.enumerated()), id: \.element.id) { index, item in
                             galleryImageView(item: item, index: index)
                                 .onAppear {
@@ -38,7 +38,7 @@ struct CharacterDetailGalleryView: View {
                                 }
                         }
                     }
-                    .padding(.horizontal, 0)
+                    .frame(width: screenSize().width)
                 }
                 
                 Spacer()
diff --git a/SodaLive/Sources/Chat/Character/Detail/Gallery/CharacterImageListResponse.swift b/SodaLive/Sources/Chat/Character/Detail/Gallery/CharacterImageListResponse.swift
index 975c821..54ab0f9 100644
--- a/SodaLive/Sources/Chat/Character/Detail/Gallery/CharacterImageListResponse.swift
+++ b/SodaLive/Sources/Chat/Character/Detail/Gallery/CharacterImageListResponse.swift
@@ -11,7 +11,7 @@ struct CharacterImageListResponse: Decodable {
     let items: [CharacterImageListItemResponse]
 }
 
-struct CharacterImageListItemResponse: Decodable {
+struct CharacterImageListItemResponse: Decodable, Hashable {
     let id: Int
     let imageUrl: String
     let isOwned: Bool
diff --git a/SodaLive/Sources/Chat/Talk/Room/ChatRoomView.swift b/SodaLive/Sources/Chat/Talk/Room/ChatRoomView.swift
index 8d3ee93..d219a65 100644
--- a/SodaLive/Sources/Chat/Talk/Room/ChatRoomView.swift
+++ b/SodaLive/Sources/Chat/Talk/Room/ChatRoomView.swift
@@ -249,7 +249,14 @@ struct ChatRoomView: View {
             }
             
             if viewModel.isShowingChangeBgView {
-                ChatBgSelectionView()
+                ChatBgSelectionView(
+                    characterId: viewModel.characterId,
+                    selectedBgImageId: viewModel.chatRoomBgImageId,
+                    onTapBgImage: {
+                        viewModel.setBackgroundImage(imageItem: $0)
+                    },
+                    isShowing: $viewModel.isShowingChangeBgView
+                )
             }
             
             if viewModel.isShowingChatResetConfirmDialog {
@@ -325,19 +332,28 @@ struct ChatRoomBgView: View {
     let url: String?
     
     var body: some View {
-        ZStack {
-            if let url = url {
-                KFImage(URL(string: url))
-                    .resizable()
-                    .aspectRatio(4/5, contentMode: .fill)
-                    .frame(maxWidth: screenSize().width)
+        GeometryReader { geo in
+            let width = geo.size.width
+            let height = width * 5 / 4
+            
+            ZStack {
+                if let url = url {
+                    KFImage(URL(string: url))
+                        .resizable()
+                        .scaledToFill()
+                        .frame(width: width, height: height)
+                        .clipped()
+                        .ignoresSafeArea()
+                }
+                
+                Color.black
+                    .opacity(0.6)
                     .ignoresSafeArea()
             }
-            
-            Color.black
-                .opacity(0.6)
-                .ignoresSafeArea()
+            .frame(width: width, height: height)
+            .clipped()
         }
+        .aspectRatio(4/5, contentMode: .fit)
     }
 }
 
diff --git a/SodaLive/Sources/Chat/Talk/Room/ChatRoomViewModel.swift b/SodaLive/Sources/Chat/Talk/Room/ChatRoomViewModel.swift
index 4c9b7e9..7104aa5 100644
--- a/SodaLive/Sources/Chat/Talk/Room/ChatRoomViewModel.swift
+++ b/SodaLive/Sources/Chat/Talk/Room/ChatRoomViewModel.swift
@@ -16,6 +16,8 @@ final class ChatRoomViewModel: ObservableObject {
     @Published var errorMessage: String = ""
     @Published var isShowPopup = false
     
+    @Published var chatRoomBgImageId: Int = 0
+    @Published private(set) var characterId: Int64 = 0
     @Published private(set) var characterProfileUrl: String = ""
     @Published private(set) var characterName: String = "Character Name"
     @Published private(set) var characterType: CharacterType = .Character
@@ -135,10 +137,11 @@ final class ChatRoomViewModel: ObservableObject {
         isLoading = true
         self.roomId = roomId
         self.isHideBg = UserDefaults.standard.bool(forKey: bgHideKey())
+        self.chatRoomBgImageId = getSavedBackgroundImageId() ?? 0
         
         repository.enterChatRoom(
             roomId: roomId,
-            characterImageId: getSavedBackgroundImageId()
+            characterImageId: self.chatRoomBgImageId
         )
         .sink { result in
             switch result {
@@ -155,6 +158,7 @@ final class ChatRoomViewModel: ObservableObject {
                 let decoded = try jsonDecoder.decode(ApiResponse<ChatRoomEnterResponse>.self, from: responseData)
                 
                 if let data = decoded.data, decoded.success {
+                    self?.characterId = data.character.characterId
                     self?.characterName = data.character.name
                     self?.characterType = data.character.characterType
                     self?.characterProfileUrl = data.character.profileImageUrl
@@ -352,6 +356,12 @@ final class ChatRoomViewModel: ObservableObject {
         }
     }
     
+    func setBackgroundImage(imageItem: CharacterImageListItemResponse) {
+        UserDefaults.standard.set(imageItem.id, forKey: bgImageIdKey())
+        chatRoomBgImageUrl = imageItem.imageUrl
+        chatRoomBgImageId = imageItem.id
+    }
+    
     private func resetData() {
         characterProfileUrl = ""
         characterName = "Character Name"
diff --git a/SodaLive/Sources/Chat/Talk/Room/Settings/ChatBgSelectionView.swift b/SodaLive/Sources/Chat/Talk/Room/Settings/ChatBgSelectionView.swift
index d8b790e..545acd6 100644
--- a/SodaLive/Sources/Chat/Talk/Room/Settings/ChatBgSelectionView.swift
+++ b/SodaLive/Sources/Chat/Talk/Room/Settings/ChatBgSelectionView.swift
@@ -8,11 +8,117 @@
 import SwiftUI
 
 struct ChatBgSelectionView: View {
+    
+    @StateObject var viewModel = ChatBgSelectionViewModel()
+    
+    private let columns = Array(
+        repeating: GridItem(.flexible(), spacing: 0),
+        count: 3
+    )
+    
+    let characterId: Int64
+    let selectedBgImageId: Int
+    let onTapBgImage: (CharacterImageListItemResponse) -> Void
+    
+    @Binding var isShowing: Bool
+    
     var body: some View {
-        Text(/*@START_MENU_TOKEN@*/"Hello, World!"/*@END_MENU_TOKEN@*/)
+        BaseView(isLoading: $viewModel.isLoading) {
+            VStack(spacing: 0) {
+                DetailNavigationBar(title: "배경 사진 선택") {
+                    isShowing = false
+                }
+                // 갤러리 그리드
+                ScrollView {
+                    LazyVGrid(columns: columns, spacing: 0) {
+                        ForEach(viewModel.galleryItems, id: \.self) { item in
+                            galleryImageView(item: item)
+                                .onAppear {
+                                    viewModel.loadMoreIfNeeded(currentItem: item)
+                                }
+                        }
+                    }
+                    .frame(maxWidth: screenSize().width)
+                }
+                
+                Spacer()
+            }
+            .popup(isPresented: $viewModel.isShowPopup, type: .toast, position: .top, autohideIn: 2) {
+                GeometryReader { geo in
+                    HStack {
+                        Spacer()
+                        Text(viewModel.errorMessage)
+                            .padding(.vertical, 13.3)
+                            .frame(alignment: .center)
+                            .frame(maxWidth: .infinity)
+                            .padding(.horizontal, 33.3)
+                            .font(.custom(Font.medium.rawValue, size: 12))
+                            .background(Color.button)
+                            .foregroundColor(Color.white)
+                            .multilineTextAlignment(.center)
+                            .cornerRadius(20)
+                            .padding(.top, 66.7)
+                        Spacer()
+                    }
+                }
+            }
+        }
+        .onAppear {
+            viewModel.characterId = characterId
+            viewModel.loadInitialData()
+        }
+    }
+    
+    @ViewBuilder
+    private func galleryImageView(item: CharacterImageListItemResponse) -> some View {
+        GeometryReader { geo in
+            let width = geo.size.width
+            let height = width * 5 / 4
+            
+            ZStack(alignment: .bottomTrailing) {
+                // 이미지
+                AsyncImage(url: URL(string: item.imageUrl)) { image in
+                    image
+                        .resizable()
+                        .scaledToFill()
+                        .frame(width: width, height: height)
+                        .clipped()
+                } placeholder: {
+                    Rectangle()
+                        .fill(Color.gray.opacity(0.3))
+                }
+                .overlay {
+                    Rectangle()
+                        .stroke(lineWidth: 1)
+                        .foregroundColor(.button)
+                        .opacity(selectedBgImageId == item.id ? 1 : 0)
+                }
+                
+                if selectedBgImageId == item.id {
+                    Text("현재 배경")
+                        .font(.custom(Font.preRegular.rawValue, size: 12))
+                        .foregroundColor(.white)
+                        .padding(.horizontal, 6)
+                        .padding(.vertical, 2)
+                        .background(Color.button)
+                        .cornerRadius(6.7)
+                        .padding(6)
+                }
+            }
+            .frame(width: width, height: height)
+            .clipped()
+            .contentShape(Rectangle())
+            .onTapGesture { onTapBgImage(item) }
+        }
+        .aspectRatio(4/5, contentMode: .fit)
     }
 }
 
 #Preview {
-    ChatBgSelectionView()
+    ChatBgSelectionView(
+        characterId: 0,
+        selectedBgImageId: 1,
+        onTapBgImage: { _ in },
+        isShowing: .constant(true)
+    )
 }
diff --git a/SodaLive/Sources/Chat/Talk/Room/Settings/ChatBgSelectionViewModel.swift b/SodaLive/Sources/Chat/Talk/Room/Settings/ChatBgSelectionViewModel.swift
new file mode 100644
index 0000000..a80b2c4
--- /dev/null
+++ b/SodaLive/Sources/Chat/Talk/Room/Settings/ChatBgSelectionViewModel.swift
@@ -0,0 +1,96 @@
+//
+//  ChatBgSelectionViewModel.swift
+//  SodaLive
+//
+//  Created by klaus on 9/4/25.
+//
+
+import Foundation
+import Combine
+import Moya
+
+final class ChatBgSelectionViewModel: ObservableObject {
+    // MARK: - Published State
+    @Published var isLoading: Bool = false
+    @Published var errorMessage: String = ""
+    @Published var isShowPopup = false
+    
+    @Published var galleryItems: [CharacterImageListItemResponse] = []
+    
+    private let repository = CharacterDetailGalleryRepository()
+    private var subscription = Set<AnyCancellable>()
+    private var currentPage = 0
+    private var isLast = false
+    
+    var characterId: Int64 = 0
+    
+    // MARK: - Public Methods
+    func loadInitialData() {
+        currentPage = 0
+        isLast = false
+        galleryItems.removeAll()
+        loadImageList()
+    }
+    
+    func loadMoreIfNeeded(currentItem: CharacterImageListItemResponse) {
+        guard !isLast,
+              !isLoading,
+              let lastItem = galleryItems.last,
+              lastItem.id == currentItem.id else { return }
+        
+        loadImageList()
+    }
+    
+    // MARK: - Private Methods
+    private func loadImageList() {
+        guard !isLoading else { return }
+        
+        isLoading = true
+        
+        repository.getMyCharacterImageList(
+            characterId: characterId,
+            page: currentPage,
+            size: 20
+        )
+        .receive(on: DispatchQueue.main)
+        .sink { result in
+            switch result {
+            case .finished:
+                DEBUG_LOG("finish")
+            case .failure(let error):
+                ERROR_LOG(error.localizedDescription)
+            }
+        } receiveValue: { [weak self] response in
+            let responseData = response.data
+            self?.isLoading = false
+            
+            do {
+                let jsonDecoder = JSONDecoder()
+                let decoded = try jsonDecoder.decode(ApiResponse<CharacterImageListResponse>.self, from: responseData)
+                
+                if let data = decoded.data, decoded.success {
+                    self?.currentPage += 1
+                    self?.handleImageListResponse(data)
+                } else {
+                    if let message = decoded.message {
+                        self?.errorMessage = message
+                    } else {
+                        self?.errorMessage = "다시 시도해 주세요.\n계속 같은 문제가 발생할 경우 고객센터로 문의 주시기 바랍니다."
+                    }
+                    
+                    self?.isShowPopup = true
+                }
+            } catch {
+                ERROR_LOG(String(describing: error))
+                self?.errorMessage = "다시 시도해 주세요.\n계속 같은 문제가 발생할 경우 고객센터로 문의 주시기 바랍니다."
+                self?.isShowPopup = true
+            }
+        }
+        .store(in: &subscription)
+    }
+    
+    private func handleImageListResponse(_ response: CharacterImageListResponse) {
+        galleryItems.append(contentsOf: response.items)
+        isLast = response.items.isEmpty
+    }
+}
diff --git a/SodaLive/Sources/Chat/Talk/Room/Settings/ChatSettingsView.swift b/SodaLive/Sources/Chat/Talk/Room/Settings/ChatSettingsView.swift
index 3fde9ec..4ebcd19 100644
--- a/SodaLive/Sources/Chat/Talk/Room/Settings/ChatSettingsView.swift
+++ b/SodaLive/Sources/Chat/Talk/Room/Settings/ChatSettingsView.swift
@@ -56,6 +56,7 @@ struct ChatSettingsView: View {
                             .frame(maxWidth: .infinity)
                             .frame(height: 1)
                     }
+                    .contentShape(Rectangle())
                     .onTapGesture { onTapChangeBg() }
                     
                     HStack(spacing: 0) {
@@ -100,6 +101,7 @@ struct ChatSettingsView: View {
                     }
                     .padding(.horizontal, 24)
                     .padding(.vertical, 12)
+                    .contentShape(Rectangle())
                     .onTapGesture { onTapResetChatRoom() }
                 }
             }
diff --git a/SodaLive/Sources/NavigationBar/DetailNavigationBar.swift b/SodaLive/Sources/NavigationBar/DetailNavigationBar.swift
index 9b17eea..467cf15 100644
--- a/SodaLive/Sources/NavigationBar/DetailNavigationBar.swift
+++ b/SodaLive/Sources/NavigationBar/DetailNavigationBar.swift
@@ -34,6 +34,7 @@ struct DetailNavigationBar: View {
             
             Spacer()
         }
+        .frame(maxWidth: .infinity)
         .padding(.horizontal, 13.3)
         .frame(height: 50)
         .background(Color.black)