diff --git a/public/js/app.js b/public/js/app.js
index a2293a0..135e2bc 100644
--- a/public/js/app.js
+++ b/public/js/app.js
@@ -2121,7 +2121,8 @@
           ${source.description ? `<div class="source-item-desc">${escapeHtml(source.description)}</div>` : ''}
         </div>
         <div class="source-item-actions">
-          <button class="btn btn-delete" onclick="deleteSource(${source.id})">删除</button>
+          <button class="btn btn-secondary btn-sm" onclick="editSource(${JSON.stringify(source).replace(/"/g, '&quot;')})">编辑</button>
+          <button class="btn btn-delete btn-sm" onclick="deleteSource(${source.id})">删除</button>
         </div>
       </div>
     `).join('');
@@ -2166,6 +2167,55 @@
   }
 
   // ---- Add Source ----
+  let editingSourceId = null;
+
+  window.editSource = function(source) {
+    editingSourceId = source.id;
+    dom.sourceName.value = source.name || '';
+    dom.sourceUrl.value = source.url || '';
+    dom.sourceType.value = source.type || 'prometheus';
+    dom.sourceDesc.value = source.description || '';
+    dom.isServerSource.checked = !!source.is_server_source;
+    
+    // Toggle Blackbox UI
+    if (source.type === 'blackbox') {
+      dom.serverSourceOption.style.display = 'none';
+    } else {
+      dom.serverSourceOption.style.display = 'flex';
+    }
+
+    dom.btnAdd.textContent = '保存修改';
+    
+    // Add cancel button if not already there
+    if (!document.getElementById('btnCancelEditSource')) {
+      const cancelBtn = document.createElement('button');
+      cancelBtn.id = 'btnCancelEditSource';
+      cancelBtn.className = 'btn btn-secondary';
+      cancelBtn.style.marginLeft = '8px';
+      cancelBtn.textContent = '取消';
+      cancelBtn.onclick = cancelEditSource;
+      dom.btnAdd.parentNode.appendChild(cancelBtn);
+    }
+    
+    // Scroll to form
+    dom.sourceName.focus();
+  };
+
+  function cancelEditSource() {
+    editingSourceId = null;
+    dom.sourceName.value = '';
+    dom.sourceUrl.value = '';
+    dom.sourceType.value = 'prometheus';
+    dom.sourceDesc.value = '';
+    dom.isServerSource.checked = true;
+    dom.serverSourceOption.style.display = 'flex';
+    dom.btnAdd.textContent = '添加';
+    
+    const cancelBtn = document.getElementById('btnCancelEditSource');
+    if (cancelBtn) cancelBtn.remove();
+    hideMessage();
+  }
+
   async function addSource() {
     if (!user) {
       showMessage('请先登录后操作', 'error');
@@ -2185,21 +2235,29 @@
       return;
     }
 
-    dom.btnAdd.textContent = '添加中...';
+    const isEditing = editingSourceId !== null;
+    dom.btnAdd.textContent = isEditing ? '保存中...' : '添加中...';
     dom.btnAdd.disabled = true;
 
     try {
-      const response = await fetch('/api/sources', {
-        method: 'POST',
+      const urlPath = isEditing ? `/api/sources/${editingSourceId}` : '/api/sources';
+      const method = isEditing ? 'PUT' : 'POST';
+      
+      const response = await fetch(urlPath, {
+        method: method,
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify({ name, url, description, is_server_source, type })
       });
 
       if (response.ok) {
-        showMessage('数据源添加成功', 'success');
-        dom.sourceName.value = '';
-        dom.sourceUrl.value = '';
-        dom.sourceDesc.value = '';
+        showMessage(isEditing ? '数据源更新成功' : '数据源添加成功', 'success');
+        if (isEditing) {
+          cancelEditSource();
+        } else {
+          dom.sourceName.value = '';
+          dom.sourceUrl.value = '';
+          dom.sourceDesc.value = '';
+        }
         loadSources();
         fetchMetrics();
         fetchNetworkHistory();
diff --git a/server/index.js b/server/index.js
index bebedda..071fa35 100644
--- a/server/index.js
+++ b/server/index.js
@@ -507,7 +507,7 @@ app.post('/api/sources', requireAuth, async (req, res) => {
 
 // Update a Prometheus source
 app.put('/api/sources/:id', requireAuth, async (req, res) => {
-  let { name, url, description, is_server_source } = req.body;
+  let { name, url, description, is_server_source, type } = req.body;
   if (url && !/^https?:\/\//i.test(url)) url = 'http://' + url;
   try {
     await db.query(