diff --git a/apps/cs/app/(with-base-layout)/template/register/[sequential]/page.tsx b/apps/cs/app/(with-base-layout)/template/register/[sequential]/page.tsx
new file mode 100644
index 000000000..3878a4e41
--- /dev/null
+++ b/apps/cs/app/(with-base-layout)/template/register/[sequential]/page.tsx
@@ -0,0 +1,10 @@
+import { ModifyPage as VModifyPage } from "@/pages/template";
+
+export default async function ModifyPage({
+  params,
+}: {
+  params: Promise<{ sequential: string }>;
+}) {
+  const { sequential } = await params;
+  return <VModifyPage sequential={sequential} />;
+}
diff --git a/apps/cs/src/entities/editor/api/editor-service.ts b/apps/cs/src/entities/editor/api/editor-service.ts
new file mode 100644
index 000000000..3e2fc75a4
--- /dev/null
+++ b/apps/cs/src/entities/editor/api/editor-service.ts
@@ -0,0 +1,19 @@
+import { client } from "@/shared/api";
+import type {
+  EditorService,
+  FileInfo,
+  UploadFile,
+} from "../model/editor-interface";
+import { ENDPOINT } from "@/shared/config";
+
+export class EditorApiService implements EditorService {
+  async uploadImage(data: UploadFile): Promise<FileInfo> {
+    const response = await client.post<FileInfo>(
+      ENDPOINT.ATTACH_SERVICE.EDITOR_UPLOAD,
+      data,
+    );
+    return response.data;
+  }
+}
+
+export const EditorApi = new EditorApiService();
diff --git a/apps/cs/src/entities/editor/index.ts b/apps/cs/src/entities/editor/index.ts
new file mode 100644
index 000000000..1ae82fb4f
--- /dev/null
+++ b/apps/cs/src/entities/editor/index.ts
@@ -0,0 +1 @@
+export { Editor } from "./ui/editor";
diff --git a/apps/cs/src/entities/editor/model/editor-base-config.ts b/apps/cs/src/entities/editor/model/editor-base-config.ts
new file mode 100644
index 000000000..1b97ba9a0
--- /dev/null
+++ b/apps/cs/src/entities/editor/model/editor-base-config.ts
@@ -0,0 +1,37 @@
+import { SERVER_API_URL } from "@/shared/config";
+
+export const editorBaseConfig = {
+  apiKey: process.env.NEXT_PUBLIC_TINY_API_KEY,
+  init: {
+    language: "ko_KR",
+    height: 500,
+    plugins: [
+      "advlist",
+      "autolink",
+      "lists",
+      "link",
+      "image",
+      "charmap",
+      "preview",
+      "anchor",
+      "searchreplace",
+      "visualblocks",
+      "code",
+      "codesample",
+      "fullscreen",
+      "insertdatetime",
+      "media",
+      "table",
+      "code",
+      "help",
+      "wordcount",
+      "save",
+    ],
+    toolbar: [
+      "undo redo | blocks fontfamily fontsize | bold italic underline strikethrough forecolor backcolor | alignleft aligncenter alignright alignjustify | bullist numlist blockquote | table",
+      "link image",
+    ],
+    images_upload_base_path: SERVER_API_URL,
+    file_picker_types: "image",
+  },
+};
diff --git a/apps/cs/src/entities/editor/model/editor-interface.ts b/apps/cs/src/entities/editor/model/editor-interface.ts
new file mode 100644
index 000000000..ed6b4a987
--- /dev/null
+++ b/apps/cs/src/entities/editor/model/editor-interface.ts
@@ -0,0 +1,20 @@
+export interface UploadFile {
+  fieldName: string;
+  fileType: string;
+  fileBase64: string;
+  originalName: string;
+  size: number;
+}
+
+export interface FileInfo {
+  originalFileName: string;
+  message: string;
+  fileType: string;
+  size: number;
+  uploaded: number;
+  url: string;
+}
+
+export interface EditorService {
+  uploadImage(data: UploadFile): Promise<FileInfo>;
+}
diff --git a/apps/cs/src/entities/editor/ui/editor.tsx b/apps/cs/src/entities/editor/ui/editor.tsx
new file mode 100644
index 000000000..e55bf89a0
--- /dev/null
+++ b/apps/cs/src/entities/editor/ui/editor.tsx
@@ -0,0 +1,70 @@
+import { Editor as TinyEditor, type IAllProps } from "@tinymce/tinymce-react";
+import { editorBaseConfig as baseConfig } from "../model/editor-base-config";
+import { EditorApi } from "../api/editor-service";
+
+const Editor = ({ ...props }: IAllProps) => {
+  return (
+    <TinyEditor
+      {...baseConfig}
+      init={{
+        ...baseConfig.init,
+        images_upload_handler: (blobInfo: {
+          blob: () => Blob;
+          filename: () => string;
+        }) =>
+          new Promise(async (resolve) => {
+            const blob = blobInfo.blob();
+            const fileInfo = {
+              fieldName: `${blob.type.split("/")[1]}`,
+              fileType: blob.type,
+              fileBase64: "",
+              originalName: blobInfo.filename(),
+              size: blob.size,
+            };
+
+            const reader = new FileReader();
+            reader.onload = async () => {
+              const base64 = reader.result as string;
+              fileInfo.fileBase64 = base64.split(",")[1] || "";
+
+              const data = await EditorApi.uploadImage(fileInfo);
+              resolve(data.url);
+            };
+            reader.readAsDataURL(blob);
+          }),
+        file_picker_callback() {
+          const input = document.createElement("input");
+          input.setAttribute("type", "file");
+          input.setAttribute("accept", "image/*");
+
+          // input.addEventListener("change", (e) => {
+          //   const file = e.target.files[0];
+
+          //   const reader = new FileReader();
+          //   reader.addEventListener("load", () => {
+          //     /*
+          //       Note: Now we need to register the blob in TinyMCEs image blob
+          //       registry. In the next release this part hopefully won't be
+          //       necessary, as we are looking to handle it internally.
+          //     */
+          //     const id = "blobid" + new Date().getTime();
+          //     const blobCache = tinymce.activeEditor.editorUpload.blobCache;
+          //     const base64 = reader.result.split(",")[1];
+          //     const blobInfo = blobCache.create(id, file, base64);
+          //     blobCache.add(blobInfo);
+
+          //     /* call the callback and populate the Title field with the file name */
+          //     cb(blobInfo.blobUri(), { title: file.name });
+          //   });
+          //   reader.readAsDataURL(file);
+          // });
+
+          input.click();
+        },
+      }}
+      {...props}
+    />
+  );
+};
+
+export { Editor };
diff --git a/apps/cs/src/pages/banner/ui/banner-form.tsx b/apps/cs/src/pages/banner/ui/banner-form.tsx
index 49c9cc6a1..a39be8c1a 100644
--- a/apps/cs/src/pages/banner/ui/banner-form.tsx
+++ b/apps/cs/src/pages/banner/ui/banner-form.tsx
@@ -30,7 +30,7 @@ import { handleUpload } from "../lib/utils";
 
 type BannerFormProps = {
   form: UseFormReturn<BannerFormData>;
-  bnrSn?: string;
+  bnrSn?: number;
   handleSave: (data: BannerFormData) => Promise<void>;
   handleDelete?: () => Promise<void>;
 };
diff --git a/apps/cs/src/pages/banner/ui/modify-page.tsx b/apps/cs/src/pages/banner/ui/modify-page.tsx
index 7af0f246b..024e334c1 100644
--- a/apps/cs/src/pages/banner/ui/modify-page.tsx
+++ b/apps/cs/src/pages/banner/ui/modify-page.tsx
@@ -108,7 +108,7 @@ function ModifyPage({ sequential }: { sequential: string }) {
           </div>
           <BannerForm
             form={form}
-            bnrSn={sequential}
+            bnrSn={Number(sequential)}
             handleSave={updateBanner}
             handleDelete={deleteBanner}
           />
diff --git a/apps/cs/src/pages/image/ui/image-form.tsx b/apps/cs/src/pages/image/ui/image-form.tsx
index 4a768811b..9a5857b31 100644
--- a/apps/cs/src/pages/image/ui/image-form.tsx
+++ b/apps/cs/src/pages/image/ui/image-form.tsx
@@ -24,11 +24,12 @@ import { AttachmentApi } from "@/entities/attachment";
 import { ENDPOINT } from "@/shared/config";
 import { useTus } from "@/shared/lib/use-tus";
 import { FormControl, FormField, FormItem } from "@/shared/ui/form";
+import { useAttachmentStore } from "@/shared/lib/use-attachment-store";
 import type { ImageFormData } from "../model/image-interface";
 
 type ImageFormProps = {
   form: UseFormReturn<ImageFormData>;
-  imgSn?: string;
+  imgSn?: number;
   handleSave: (data: ImageFormData) => Promise<void>;
   handleDelete?: () => Promise<void>;
 };
@@ -43,6 +44,7 @@ function ImageForm({ form, imgSn, ...props }: ImageFormProps) {
     progress,
     setFile,
   } = useTus();
+  const { setAttachmentFileCode } = useAttachmentStore((state) => state);
   const [imageUrl, setImageUrl] = useState("");
 
   const { data: attachmentData } = useQuery({
@@ -201,6 +203,7 @@ function ImageForm({ form, imgSn, ...props }: ImageFormProps) {
                             onUpload={(e) => {
                               const files = e.target.files;
                               if (!files) return;
+                              setAttachmentFileCode("");
                               setFile(files[0] ?? null);
                             }}
                             customPreview={
diff --git a/apps/cs/src/pages/image/ui/modify-page.tsx b/apps/cs/src/pages/image/ui/modify-page.tsx
index 1405ed1f2..cf51acd6a 100644
--- a/apps/cs/src/pages/image/ui/modify-page.tsx
+++ b/apps/cs/src/pages/image/ui/modify-page.tsx
@@ -104,7 +104,7 @@ function ModifyPage({ sequential }: { sequential: string }) {
           </div>
           <ImageForm
             form={form}
-            imgSn={sequential}
+            imgSn={Number(sequential)}
             handleSave={updateImage}
             handleDelete={deleteImage}
           />
diff --git a/apps/cs/src/pages/template/api/template-service.ts b/apps/cs/src/pages/template/api/template-service.ts
index 6f2d1f73a..9a1fe4c5e 100644
--- a/apps/cs/src/pages/template/api/template-service.ts
+++ b/apps/cs/src/pages/template/api/template-service.ts
@@ -5,6 +5,7 @@ import type {
   TemplateList,
   TemplateParams,
   TemplateFormData,
+  Template,
 } from "../model/template-interface";
 
 export class TemplateApiService implements TemplateService {
@@ -16,6 +17,13 @@ export class TemplateApiService implements TemplateService {
     return response.data;
   }
 
+  public async getTemplateInfo(tmpltSn: string): Promise<Template> {
+    const response = await client.get<Template>(
+      `${ENDPOINT.CMS_SERVICE.TEMPLATE}/${tmpltSn}`,
+    );
+    return response.data;
+  }
+
   public async createTemplate(data: TemplateFormData): Promise<void> {
     const response = await client.post<void>(
       `${ENDPOINT.CMS_SERVICE.TEMPLATE}`,
@@ -23,6 +31,17 @@ export class TemplateApiService implements TemplateService {
     );
     return response.data;
   }
+
+  public async updateTemplate(
+    tmpltSn: string,
+    data: TemplateFormData,
+  ): Promise<void> {
+    const response = await client.put<void>(
+      `${ENDPOINT.CMS_SERVICE.TEMPLATE}/${tmpltSn}`,
+      data,
+    );
+    return response.data;
+  }
 }
 
 export const TemplateApi = new TemplateApiService();
diff --git a/apps/cs/src/pages/template/index.ts b/apps/cs/src/pages/template/index.ts
index 220fd50c6..9db5d7fc0 100644
--- a/apps/cs/src/pages/template/index.ts
+++ b/apps/cs/src/pages/template/index.ts
@@ -1,2 +1,3 @@
 export { CreatePage } from "./ui/create-page";
+export { ModifyPage } from "./ui/modify-page";
 export { TemplatePage } from "./ui/template-page";
diff --git a/apps/cs/src/pages/template/model/template-interface.ts b/apps/cs/src/pages/template/model/template-interface.ts
index 306fe8197..c6dfe7a89 100644
--- a/apps/cs/src/pages/template/model/template-interface.ts
+++ b/apps/cs/src/pages/template/model/template-interface.ts
@@ -11,10 +11,14 @@ export interface TemplateParams extends PageableParams {
 export interface Template {
   tmpltSn: number;
   tmpltNm: string;
+  tmpltCn: string;
   tmpltSeCd: string;
   tmpltSeNm: string;
   useYn: string;
+  delYn: string;
+  regDt: string;
   mdfcnDt: string;
+  rgTrNm: string;
   mdfr: string;
   mdfrNm: string;
 }
@@ -23,12 +27,14 @@ export const templateFormSchema = z.object({
   tmpltNm: z.string(),
   tmpltCn: z.string(),
   tmpltSeCd: z.string(),
-  useYn: z.string(),
+  useYn: z.string().nullish(),
 });
 
 export type TemplateList = PageableList<Template>;
 export type TemplateFormData = z.infer<typeof templateFormSchema>;
 export interface TemplateService {
   getTemplateList(params: TemplateParams): Promise<TemplateList>;
+  getTemplateInfo(tmpltSn: string): Promise<Template>;
   createTemplate(data: TemplateFormData): Promise<void>;
+  updateTemplate(tmpltSn: string, data: TemplateFormData): Promise<void>;
 }
diff --git a/apps/cs/src/pages/template/ui/modify-page.tsx b/apps/cs/src/pages/template/ui/modify-page.tsx
new file mode 100644
index 000000000..7389cda95
--- /dev/null
+++ b/apps/cs/src/pages/template/ui/modify-page.tsx
@@ -0,0 +1,50 @@
+"use client";
+
+import { useForm } from "react-hook-form";
+import { useMutation, useQuery } from "@tanstack/react-query";
+import { zodResolver } from "@hookform/resolvers/zod";
+import { ENDPOINT } from "@/shared/config";
+import { useAlertStore } from "@/shared/lib/use-alert-store";
+import {
+  templateFormSchema,
+  type TemplateFormData,
+} from "../model/template-interface";
+import { TemplateApi } from "../api/template-service";
+import { TemplateForm } from "./template-form";
+
+function ModifyPage({ sequential }: { sequential: string }) {
+  const { setMessage: alert } = useAlertStore((state) => state);
+
+  const { data: templateDetail } = useQuery({
+    queryKey: [ENDPOINT.CMS_SERVICE.TEMPLATE, sequential],
+    queryFn: () => TemplateApi.getTemplateInfo(sequential),
+  });
+
+  const { mutateAsync: updateTemplate } = useMutation({
+    mutationFn: (data: TemplateFormData) =>
+      TemplateApi.updateTemplate(sequential, data),
+    onSuccess: () => {
+      alert("수정되었습니다.");
+    },
+  });
+
+  const form = useForm<TemplateFormData>({
+    resolver: zodResolver(templateFormSchema),
+    values: templateDetail,
+  });
+
+  return (
+    <div className="card card-border !mb-0 !mt-6">
+      <div className="card-header">
+        <h3 className="text-2xl font-medium text-label">템플릿 수정</h3>
+      </div>
+      <TemplateForm
+        form={form}
+        tmpltSn={Number(sequential)}
+        handleSave={updateTemplate}
+      />
+    </div>
+  );
+}
+
+export { ModifyPage };
diff --git a/apps/cs/src/pages/template/ui/template-form.tsx b/apps/cs/src/pages/template/ui/template-form.tsx
index 07f18186d..7d443e420 100644
--- a/apps/cs/src/pages/template/ui/template-form.tsx
+++ b/apps/cs/src/pages/template/ui/template-form.tsx
@@ -17,7 +17,7 @@ import { FormItem, FormControl, FormField } from "@/shared/ui/form";
 import type { TemplateFormData } from "../model/template-interface";
 
 const Editor = dynamic(
-  () => import("@/shared/ui/editor").then((module) => module.Editor),
+  () => import("@/entities/editor").then((module) => module.Editor),
   { ssr: false },
 );
 
@@ -34,8 +34,8 @@ function TemplateForm({ form, tmpltSn, ...props }: TemplateFormProps) {
       <div className="card">
         <Table variant="secondary">
           <colgroup>
-            <col width="20%" />
-            <col width="80%" />
+            <col width="10%" />
+            <col width="90%" />
           </colgroup>
           <TableBody>
             <TableRow>
@@ -85,10 +85,13 @@ function TemplateForm({ form, tmpltSn, ...props }: TemplateFormProps) {
                 <FormField
                   control={form.control}
                   name="tmpltCn"
-                  render={() => (
+                  render={({ field }) => (
                     <FormItem>
                       <FormControl>
-                        <Editor />
+                        <Editor
+                          value={field.value ?? ""}
+                          onEditorChange={field.onChange}
+                        />
                       </FormControl>
                     </FormItem>
                   )}
@@ -107,6 +110,7 @@ function TemplateForm({ form, tmpltSn, ...props }: TemplateFormProps) {
                         <RadioGroup
                           {...field}
                           name="useYn"
+                          value={field.value ?? ""}
                           onValueChange={field.onChange}
                         >
                           <div className="flex items-center space-x-2">
diff --git a/apps/cs/src/shared/config/api.ts b/apps/cs/src/shared/config/api.ts
index 6ed82dec1..cb140e5ea 100644
--- a/apps/cs/src/shared/config/api.ts
+++ b/apps/cs/src/shared/config/api.ts
@@ -5,6 +5,7 @@ export const BASE_URL = `${PROXY_HOST}/server`;
 export const ENDPOINT = {
   ATTACH_SERVICE: {
     TUS_UPLOAD: "/attach-service/api/v1/tus/upload",
+    EDITOR_UPLOAD: "/attach-service/api/v1/upload/editor",
     IMAGES: "/attach-service/api/v1/images",
     ATTACHMENTS: "/attach-service/api/v1/atfl/attachments",
   },
diff --git a/apps/cs/src/shared/lib/use-attachment-store.ts b/apps/cs/src/shared/lib/use-attachment-store.ts
new file mode 100644
index 000000000..285699cc6
--- /dev/null
+++ b/apps/cs/src/shared/lib/use-attachment-store.ts
@@ -0,0 +1,14 @@
+import { useStore } from "zustand";
+import { useContext } from "react";
+import type { AttachmentStore } from "../store/attachment-store";
+import { StoreContext } from "../providers/store-provider";
+
+export const useAttachmentStore = <T>(
+  selector: (store: AttachmentStore) => T,
+): T => {
+  const store = useContext(StoreContext);
+  if (!store) {
+    throw new Error("useAttachmentStore must be used within StoreProvider");
+  }
+  return useStore(store.attachmentStore, selector);
+};
diff --git a/apps/cs/src/shared/providers/store-provider.tsx b/apps/cs/src/shared/providers/store-provider.tsx
index 82783bdac..a0ec17b61 100644
--- a/apps/cs/src/shared/providers/store-provider.tsx
+++ b/apps/cs/src/shared/providers/store-provider.tsx
@@ -1,10 +1,16 @@
 "use client";
 
 import { createContext, useRef } from "react";
-import { createAlertStore, createMenuStore, createUserStore } from "../store";
+import {
+  createAlertStore,
+  createAttachmentStore,
+  createMenuStore,
+  createUserStore,
+} from "../store";
 
 type StoreContextType = {
   alertStore: ReturnType<typeof createAlertStore>;
+  attachmentStore: ReturnType<typeof createAttachmentStore>;
   menuStore: ReturnType<typeof createMenuStore>;
   userStore: ReturnType<typeof createUserStore>;
 };
@@ -18,6 +24,7 @@ export const StoreProvider = ({ children }: { children: React.ReactNode }) => {
   if (storeRef.current === null) {
     storeRef.current = {
       alertStore: createAlertStore(),
+      attachmentStore: createAttachmentStore(),
       menuStore: createMenuStore(),
       userStore: createUserStore(),
     };
diff --git a/apps/cs/src/shared/store/attachment-store.ts b/apps/cs/src/shared/store/attachment-store.ts
new file mode 100644
index 000000000..faa700949
--- /dev/null
+++ b/apps/cs/src/shared/store/attachment-store.ts
@@ -0,0 +1,25 @@
+import { createStore } from "zustand/vanilla";
+
+export type AttachmentState = {
+  attachmentFileCode: string;
+};
+
+export type AttachmentActions = {
+  setAttachmentFileCode: (attachmentFileCode: string) => void;
+};
+
+export type AttachmentStore = AttachmentState & AttachmentActions;
+
+export const defaultInitState: AttachmentState = {
+  attachmentFileCode: "",
+};
+
+export const createAttachmentStore = (
+  initState: AttachmentState = defaultInitState,
+) => {
+  return createStore<AttachmentStore>()((set) => ({
+    ...initState,
+    setAttachmentFileCode: (attachmentFileCode: string) =>
+      set({ attachmentFileCode }),
+  }));
+};
diff --git a/apps/cs/src/shared/store/index.ts b/apps/cs/src/shared/store/index.ts
index 73c608f05..e26f6781e 100644
--- a/apps/cs/src/shared/store/index.ts
+++ b/apps/cs/src/shared/store/index.ts
@@ -1,3 +1,4 @@
 export { createAlertStore } from "./alert-store";
+export { createAttachmentStore } from "./attachment-store";
 export { createMenuStore } from "./menu-store";
 export { createUserStore, type IUserInfo } from "./user-store";
diff --git a/apps/cs/src/shared/ui/editor.tsx b/apps/cs/src/shared/ui/editor.tsx
deleted file mode 100644
index 731b13f46..000000000
--- a/apps/cs/src/shared/ui/editor.tsx
+++ /dev/null
@@ -1,19 +0,0 @@
-import { Editor as TinyEditor } from "@tinymce/tinymce-react";
-
-const Editor = () => {
-  return (
-    <TinyEditor
-      apiKey={process.env.NEXT_PUBLIC_TINY_API_KEY}
-      init={{
-        language: "ko_KR",
-        height: 500,
-        menubar: false,
-        plugins: "lists advlist table",
-        toolbar:
-          "undo redo | blocks fontfamily fontsize | bold italic underline strikethrough forecolor backcolor | alignleft aligncenter alignright alignjustify | bullist numlist blockquote | table",
-      }}
-    />
-  );
-};
-
-export { Editor };