diff --git a/src/wxsy.net/catalog.py b/src/wxsy.net/catalog.py
new file mode 100644
index 0000000..869bfd5
--- /dev/null
+++ b/src/wxsy.net/catalog.py
@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+"""
+Fetch catalog and output as JSON format
+"""
+
+import re
+import sys
+import json
+import time
+import requests
+from bs4 import BeautifulSoup
+
+basicUrl = 'https://m.wxsy.net/novel/57104/all.html'
+
+userAgent = (  # default user-agent
+    'Mozilla/5.0 (Linux; Android 10; moto g(7) play) '
+    'AppleWebKit/537.36 (KHTML, like Gecko) '
+    'Chrome/100.0.4896.79 Mobile Safari/537.36'
+)
+
+
+def httpRequest(url: str) -> str:  # fetch raw html content
+    request = requests.get(url, headers = {
+        'user-agent': userAgent,  # with fake user-agent
+        'accept-encoding': 'gzip, deflate',  # allow content compress
+    })
+    if request.status_code not in range(200, 300):  # http status code 2xx
+        raise RuntimeError('Http request failed')
+    return request.text
+
+
+def analysePage(rawHtml: str) -> list:  # extract catalog from html content
+    analyseRet = []
+    soup = BeautifulSoup(rawHtml, 'lxml')
+    div = soup.select('div[class="border-b"]')[0]
+    for row in div.select('a[class="w100 flex-wrp flex-align-center flex-between pt10 pb10"]'):
+        analyseRet.append({
+            'name': row.attrs['title'],
+            'url': row.attrs['href'],
+        })
+    return analyseRet
+
+
+def fetchCatalog(pageNum: int) -> list:  # fetch raw catalog
+    catalog = []
+    for pageIndex in range(1, pageNum + 1):  # traverse all pages (1 ~ pageNum)
+        print('Page: %d' % pageIndex, file = sys.stderr)
+        pageUrl = '%s?sort=1&page=%d' % (basicUrl, pageIndex)
+        catalog.append(analysePage(httpRequest(pageUrl)))
+        time.sleep(1)  # avoid being blocked by the server
+    return catalog
+
+
+def formatCatalog(rawCatalog: list) -> dict:
+    catalog = {}
+    for catalogPage in rawCatalog:  # traverse pages
+        for catalogItem in catalogPage:  # traverse catalog items
+            pageId = re.search(r'^/novel/57104/read_(\d+)\.html$', catalogItem['url'])[1]
+            catalog[catalogItem['name']] = pageId  # save page id
+    catalog = sorted(catalog.items(), key = lambda d: int(
+        re.search(r'^第(\d+)章', d[0])[1]  # sort by chapter
+    ))
+    return {x[0]: x[1] for x in catalog}  # formatted output
+
+
+release = formatCatalog(fetchCatalog(18))  # 18 pages in total
+print(json.dumps(release))  # output as JSON format