diff --git a/app/sitemap.ts b/app/sitemap.ts
index ddd95c0..fdb2c86 100644
--- a/app/sitemap.ts
+++ b/app/sitemap.ts
@@ -3,17 +3,41 @@ import dbConnect from '@/app/lib/dbConnect';
 import Post from '@/app/models/Post';
 
 export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
-  const baseUrl = process.env.NEXT_PUBLIC_DEPLOYMENT_URL || process.env.NEXTAUTH_URL || 'http://localhost:3000';
-  const staticPages = [
+  const baseUrl =
+    process.env.NEXT_PUBLIC_DEPLOYMENT_URL ||
+    process.env.NEXTAUTH_URL ||
+    'http://localhost:3000';
+
+  const staticPages: MetadataRoute.Sitemap = [
     {
       url: baseUrl,
       lastModified: new Date(),
       changeFrequency: 'weekly' as const,
+      priority: 1.0,
     },
     {
       url: `${baseUrl}/posts`,
       lastModified: new Date(),
+      changeFrequency: 'daily' as const,
+      priority: 0.9,
+    },
+    {
+      url: `${baseUrl}/portfolio`,
+      lastModified: new Date(),
+      changeFrequency: 'monthly' as const,
+      priority: 0.8,
+    },
+    {
+      url: `${baseUrl}/series`,
+      lastModified: new Date(),
       changeFrequency: 'weekly' as const,
+      priority: 0.7,
+    },
+    {
+      url: `${baseUrl}/tags`,
+      lastModified: new Date(),
+      changeFrequency: 'weekly' as const,
+      priority: 0.6,
     },
   ];
 
@@ -23,16 +47,41 @@ export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
   }
 
   await dbConnect(process.env.DB_URI);
-  const posts = await Post.find({}).sort({ date: -1 });
 
+  // 포스트 URL 생성
+  const posts = await Post.find({}).sort({ date: -1 });
   const postUrls = posts.map((post) => {
     const postDate = new Date(post.updatedAt || post.date);
+    // 최신 포스트는 높은 우선순위, 오래된 포스트는 낮은 우선순위
+    const priority = Math.max(0.5, 0.9 - posts.indexOf(post) * 0.01);
 
     return {
       url: `${baseUrl}/posts/${post.slug}`,
       lastModified: postDate,
+      changeFrequency: 'monthly' as const,
+      priority: Math.min(priority, 0.9), // 최대 0.9까지만 (홈페이지가 1.0)
     };
   });
 
-  return [...staticPages, ...postUrls];
+  // 시리즈 URL 생성 (포스트에서 고유한 시리즈만)
+  const seriesIds = Array.from(
+    new Set(posts.filter((p) => p.seriesId).map((p) => p.seriesId))
+  );
+  const seriesUrls = seriesIds.map((seriesId) => ({
+    url: `${baseUrl}/series/${seriesId}`,
+    lastModified: new Date(),
+    changeFrequency: 'weekly' as const,
+    priority: 0.7,
+  }));
+
+  // 포트폴리오 URL 생성 (고정된 포트폴리오 항목들)
+  const portfolioSlugs = ['shipfriend', 'preview', 'primitive', 'storyhelper'];
+  const portfolioUrls = portfolioSlugs.map((slug) => ({
+    url: `${baseUrl}/portfolio/${slug}`,
+    lastModified: new Date(),
+    changeFrequency: 'monthly' as const,
+    priority: 0.8,
+  }));
+
+  return [...staticPages, ...postUrls, ...seriesUrls, ...portfolioUrls];
 }