diff --git a/apps/cs/app/site/register/page.tsx b/apps/cs/app/site/register/page.tsx
index a11d0b60c..01e25cc43 100644
--- a/apps/cs/app/site/register/page.tsx
+++ b/apps/cs/app/site/register/page.tsx
@@ -1,2 +1,2 @@
-import { RegisterPage } from "@/pages/site";
-export default RegisterPage;
+import { CreatePage } from "@/pages/site";
+export default CreatePage;
diff --git a/apps/cs/src/entities/site/api/site-service.ts b/apps/cs/src/entities/site/api/site-service.ts
index 0430377e6..478143392 100644
--- a/apps/cs/src/entities/site/api/site-service.ts
+++ b/apps/cs/src/entities/site/api/site-service.ts
@@ -1,11 +1,12 @@
 import { client } from "@/shared/api/client";
 import { ENDPOINT } from "@/shared/config/api";
-import type {
-  ISiteInfo,
-  SiteService,
-  ISiteDetail,
-  ISiteParams,
-  SiteFormData,
+import {
+  siteFormSchema,
+  type ISiteInfo,
+  type SiteService,
+  type ISiteDetail,
+  type ISiteParams,
+  type SiteFormData,
 } from "../model/site-interface";
 
 export class SiteApiService implements SiteService {
@@ -25,9 +26,19 @@ export class SiteApiService implements SiteService {
   }
 
   public async modifySite(siteId: string, data: SiteFormData): Promise<void> {
+    const validatedData = siteFormSchema.parse(data);
     const response = await client.put<void>(
       `${ENDPOINT.CMS_SERVICE.SITES}/${siteId}`,
-      data,
+      validatedData,
+    );
+    return response.data;
+  }
+
+  public async createSite(data: SiteFormData): Promise<void> {
+    const validatedData = siteFormSchema.parse(data);
+    const response = await client.post<void>(
+      `${ENDPOINT.CMS_SERVICE.SITES}`,
+      validatedData,
     );
     return response.data;
   }
diff --git a/apps/cs/src/entities/site/model/site-interface.ts b/apps/cs/src/entities/site/model/site-interface.ts
index fbf94bfd8..4d03e2c8b 100644
--- a/apps/cs/src/entities/site/model/site-interface.ts
+++ b/apps/cs/src/entities/site/model/site-interface.ts
@@ -63,17 +63,17 @@ export interface ISiteDetail extends SiteFormData {
 }
 
 export const siteFormSchema = z.object({
-  siteId: z.string().max(2),
-  siteNm: z.string().max(100),
+  siteId: z.string().max(2).nonempty(),
+  siteNm: z.string().max(100).nonempty(),
   siteExpln: z.string().max(1000).optional(),
-  siteKndCd: z.string().max(10),
+  siteKndCd: z.string().max(10).nonempty(),
   siteAddr: z.string().max(2000).optional(),
   faxNo: z.string().max(100).optional(),
   telNo: z.string().max(1000).optional(),
   lwndCn: z.string().max(2000).optional(),
-  bscSiteYn: z.string().optional(),
+  bscSiteYn: z.string(),
   bkmkIcon: z.string().max(100).optional(),
-  useYn: z.string().optional(),
+  useYn: z.string(),
   siteSkn: z.string().max(10).optional(),
 });
 
@@ -83,4 +83,5 @@ export interface SiteService {
   siteInfo(query: ISiteParams): Promise<ISiteInfo>;
   siteDetail(siteId: string): Promise<ISiteDetail>;
   modifySite(siteId: string, data: SiteFormData): Promise<void>;
+  createSite(data: SiteFormData): Promise<void>;
 }
diff --git a/apps/cs/src/pages/site/ui/create-page.tsx b/apps/cs/src/pages/site/ui/create-page.tsx
index cbffb5fc5..10d2d9030 100644
--- a/apps/cs/src/pages/site/ui/create-page.tsx
+++ b/apps/cs/src/pages/site/ui/create-page.tsx
@@ -1,22 +1,53 @@
 "use client";
 
-import type { z } from "zod";
+import { useState } from "react";
+import { useRouter } from "next/navigation";
 import { useForm } from "react-hook-form";
+import { useMutation } from "@tanstack/react-query";
 import { zodResolver } from "@hookform/resolvers/zod";
-import { siteFormSchema } from "../model/form-schema";
+import { SiteApi, siteFormSchema, type SiteFormData } from "@/entities/site";
+import { SitePageLayout } from "./layout";
 import { SiteForm } from "./site-form";
+import {
+  Button,
+  Dialog,
+  DialogClose,
+  DialogContent,
+  DialogFooter,
+} from "@common/components/ui";
 
 function CreatePage() {
-  const form = useForm<z.infer<typeof siteFormSchema>>({
-    defaultValues: siteFormSchema.parse({
-      siteId: "",
-      siteNm: "",
-      siteKndCd: "",
-    }),
+  const router = useRouter();
+  const { mutateAsync: createSite } = useMutation({
+    mutationFn: (data: SiteFormData) => SiteApi.createSite(data),
+    onSuccess: () => {
+      setIsCreateSuccess(true);
+    },
+  });
+
+  const [isCreateSuccess, setIsCreateSuccess] = useState(false);
+
+  const form = useForm<SiteFormData>({
     resolver: zodResolver(siteFormSchema),
   });
 
-  return <SiteForm form={form} handleSave={() => {}} />;
+  return (
+    <SitePageLayout>
+      <SiteForm form={form} handleSave={createSite} />
+      <Dialog open={isCreateSuccess} onOpenChange={() => router.back()}>
+        <DialogContent aria-describedby={undefined}>
+          <div className="py-10">
+            <p className="text-center text-[1.4rem]">등록되었습니다.</p>
+          </div>
+          <DialogFooter className="!justify-center">
+            <DialogClose asChild>
+              <Button>확인</Button>
+            </DialogClose>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
+    </SitePageLayout>
+  );
 }
 
 export { CreatePage };
diff --git a/apps/cs/src/pages/site/ui/modify-page.tsx b/apps/cs/src/pages/site/ui/modify-page.tsx
index a7bbc224d..5534c75bc 100644
--- a/apps/cs/src/pages/site/ui/modify-page.tsx
+++ b/apps/cs/src/pages/site/ui/modify-page.tsx
@@ -1,6 +1,7 @@
 "use client";
 
-import { useEffect } from "react";
+import { useEffect, useState } from "react";
+import { useRouter } from "next/navigation";
 import { useForm } from "react-hook-form";
 import { useMutation, useQuery } from "@tanstack/react-query";
 import { zodResolver } from "@hookform/resolvers/zod";
@@ -13,10 +14,18 @@ import {
 import { ENDPOINT } from "@/shared/config/api";
 import { SitePageLayout } from "./layout";
 import { SiteForm } from "./site-form";
+import {
+  Button,
+  Dialog,
+  DialogClose,
+  DialogContent,
+  DialogFooter,
+} from "@common/components/ui";
 
 function ModifyPage({ siteId }: { siteId: string }) {
   const isModifyMode = !!siteId;
 
+  const router = useRouter();
   const { data: siteDetail } = useQuery({
     queryKey: [ENDPOINT.CMS_SERVICE.SITES, siteId],
     queryFn: () => SiteApi.siteDetail(siteId),
@@ -30,24 +39,17 @@ function ModifyPage({ siteId }: { siteId: string }) {
 
   const { mutateAsync: modifySite } = useMutation({
     mutationFn: (data: SiteFormData) => SiteApi.modifySite(siteId, data),
-    onSuccess: (data) => {
-      console.log("success!", data);
+    onSuccess: () => {
+      setIsModifySuccess(true);
     },
   });
 
+  const [isModifySuccess, setIsModifySuccess] = useState(false);
+
   const form = useForm<SiteFormData>({
-    defaultValues: siteFormSchema.omit({ siteId: true }).parse({
-      siteNm: "",
-      siteKndCd: "",
-    }),
     resolver: zodResolver(siteFormSchema),
   });
 
-  const handleSave = (data: SiteFormData) => {
-    console.log(data);
-    modifySite(data);
-  };
-
   useEffect(() => {
     if (!siteDetail) return;
 
@@ -55,16 +57,26 @@ function ModifyPage({ siteId }: { siteId: string }) {
     for (const key of keys) {
       form.setValue(
         key as keyof SiteFormData,
-        siteDetail[key as keyof ISiteDetail],
+        siteDetail[key as keyof ISiteDetail] ?? "",
       );
     }
   }, [siteDetail]);
 
-  console.log(form.watch());
-
   return (
     <SitePageLayout>
-      <SiteForm form={form} siteId={siteId} handleSave={handleSave} />
+      <SiteForm form={form} siteId={siteId} handleSave={modifySite} />
+      <Dialog open={isModifySuccess} onOpenChange={() => router.back()}>
+        <DialogContent aria-describedby={undefined}>
+          <div className="py-10">
+            <p className="text-center text-[1.4rem]">수정되었습니다.</p>
+          </div>
+          <DialogFooter className="!justify-center">
+            <DialogClose asChild>
+              <Button>확인</Button>
+            </DialogClose>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
     </SitePageLayout>
   );
 }
diff --git a/apps/cs/src/pages/site/ui/site-form.tsx b/apps/cs/src/pages/site/ui/site-form.tsx
index 8bbeee156..c1a5dfc02 100644
--- a/apps/cs/src/pages/site/ui/site-form.tsx
+++ b/apps/cs/src/pages/site/ui/site-form.tsx
@@ -187,17 +187,19 @@ function SiteForm({ form, siteId, handleSave }: SiteFormProps) {
                     />
                   </TableCell>
                 </TableRow>
-                <TableRow className={`${!isModifyMode ? "hidden" : ""}`}>
-                  <TableHead>사이트 도메인</TableHead>
-                  <TableCell className="border">
-                    <div className="flex gap-2">
-                      <div className="h-[3.2rem] w-[21.5rem] cursor-not-allowed rounded-md border border-input bg-form px-3 py-2 text-[1.3rem] opacity-50">
-                        {representativeDomain}
+                {isModifyMode && (
+                  <TableRow>
+                    <TableHead>사이트 도메인</TableHead>
+                    <TableCell className="border">
+                      <div className="flex gap-2">
+                        <div className="h-[3.2rem] w-[21.5rem] cursor-not-allowed rounded-md border border-input bg-form px-3 py-2 text-[1.3rem] opacity-50">
+                          {representativeDomain}
+                        </div>
+                        <DomainManagementDialog handleSave={handleDomainSave} />
                       </div>
-                      <DomainManagementDialog handleSave={handleDomainSave} />
-                    </div>
-                  </TableCell>
-                </TableRow>
+                    </TableCell>
+                  </TableRow>
+                )}
                 <TableRow>
                   <TableHead>사이트 하단 표기 주소</TableHead>
                   <TableCell className="border">
@@ -368,15 +370,17 @@ function SiteForm({ form, siteId, handleSave }: SiteFormProps) {
           </div>
         </div>
         <div className="flex justify-center gap-4 pb-12 pt-10">
+          <Button size="lg" color="white" onClick={() => router.back()}>
+            목록
+          </Button>
           <Button size="lg" type="submit">
             저장
           </Button>
-          <Button size="lg" color="white" onClick={() => router.back()}>
-            취소
-          </Button>
-          <Button size="lg" color="red">
-            삭제
-          </Button>
+          {isModifyMode && (
+            <Button size="lg" color="red">
+              삭제
+            </Button>
+          )}
         </div>
       </form>
     </Form>