diff --git a/docs/UI.md b/docs/UI.md
index 2348134..f0fc3bd 100644
--- a/docs/UI.md
+++ b/docs/UI.md
@@ -6,7 +6,7 @@
 - Email 驗證
 - 個人資料（基本資料、聯絡方式、公司資訊）
 - 收貨地址簿
-- 訂閱管理（清單與偏好）
+- 訂閱管理（清單與退訂）
 - 退訂（單一清單）
 - 連結外站（可選：回到來源站點）
 
@@ -24,7 +24,7 @@
 - 登入 / 註冊 / 忘記密碼 / 修改密碼
 - Email 驗證頁（可自建或導回會員中心）
 - 訂閱表單（未登入）
-- 訂閱偏好管理（登入後）
+- 外站自建訂閱偏好管理（登入後，走 API）
 - 退訂頁（從 email token 進來）
 
 ### 管理者端
@@ -49,7 +49,7 @@
 - UC-05 Email 驗證: `/account/verifyemail?email=...&token=...`
 - UC-07 訂閱確認（double opt-in）: `/newsletter/confirm?token=...`
 - UC-08 取消訂閱（單一清單）: `/newsletter/unsubscribe?token=...`
-- UC-09 訂閱偏好管理（登入後）: `/newsletter/preferences?list_id=...&email=...`
+- UC-09 訂閱偏好管理（外站整合 API）: `/newsletter/preferences?list_id=...&email=...`
 - UC-10 會員資料查看 / 編輯: `/profile`
 - UC-10.1 收貨地址簿管理: `/profile/addresses`
 - UC-10.2 我的電子報訂閱: `/profile/subscriptions`
diff --git a/docs/USE_CASES.md b/docs/USE_CASES.md
index bc62f63..47fb05e 100644
--- a/docs/USE_CASES.md
+++ b/docs/USE_CASES.md
@@ -14,7 +14,7 @@
 - UC-06 訂閱電子報（未登入） [API]
 - UC-07 訂閱確認（double opt-in） [UI]
 - UC-08 取消訂閱（單一清單） [UI]
-- UC-09 訂閱偏好管理（登入後） [API/UI]
+- UC-09 訂閱偏好管理（登入後） [API]
 - UC-10 會員資料查看（Email 為主） [API/UI]
 
 ## 管理者端
diff --git a/src/MemberCenter.Web/Controllers/NewsletterController.cs b/src/MemberCenter.Web/Controllers/NewsletterController.cs
index 0db72e1..7570d7f 100644
--- a/src/MemberCenter.Web/Controllers/NewsletterController.cs
+++ b/src/MemberCenter.Web/Controllers/NewsletterController.cs
@@ -1,7 +1,6 @@
 using MemberCenter.Application.Abstractions;
 using MemberCenter.Web.Models.Newsletter;
 using Microsoft.AspNetCore.Mvc;
-using System.Text.Json;
 
 namespace MemberCenter.Web.Controllers;
 
@@ -63,59 +62,4 @@ public class NewsletterController : Controller
         ViewData["Result"] = "Subscription canceled.";
         return View("UnsubscribeResult");
     }
-
-    [HttpGet]
-    public async Task<IActionResult> Preferences([FromQuery(Name = "list_id")] Guid listId, [FromQuery] string email)
-    {
-        var subscription = await _newsletterService.GetPreferencesAsync(listId, email);
-        if (subscription is null)
-        {
-            ViewData["Result"] = "Subscription not found.";
-            return View("PreferencesResult");
-        }
-
-        return View(new PreferencesViewModel
-        {
-            ListId = listId,
-            Email = email,
-            PreferencesJson = subscription.Preferences.GetRawText()
-        });
-    }
-
-    [HttpPost]
-    public async Task<IActionResult> Preferences(PreferencesViewModel model)
-    {
-        if (!ModelState.IsValid)
-        {
-            return View(model);
-        }
-
-        Dictionary<string, object>? preferences = null;
-        try
-        {
-            preferences = JsonSerializer.Deserialize<Dictionary<string, object>>(model.PreferencesJson);
-        }
-        catch
-        {
-            ModelState.AddModelError(string.Empty, "Invalid JSON.");
-            return View(model);
-        }
-
-        var existing = await _newsletterService.GetPreferencesAsync(model.ListId, model.Email);
-        if (existing is null)
-        {
-            ViewData["Result"] = "Subscription not found.";
-            return View("PreferencesResult");
-        }
-
-        var subscription = await _newsletterService.UpdatePreferencesAsync(model.ListId, model.Email, preferences ?? new Dictionary<string, object>());
-        if (subscription is null)
-        {
-            ViewData["Result"] = "Subscription not found.";
-            return View("PreferencesResult");
-        }
-
-        ViewData["Result"] = "Preferences updated.";
-        return View("PreferencesResult");
-    }
 }
diff --git a/src/MemberCenter.Web/Models/Newsletter/PreferencesViewModel.cs b/src/MemberCenter.Web/Models/Newsletter/PreferencesViewModel.cs
deleted file mode 100644
index 1275916..0000000
--- a/src/MemberCenter.Web/Models/Newsletter/PreferencesViewModel.cs
+++ /dev/null
@@ -1,15 +0,0 @@
-using System.ComponentModel.DataAnnotations;
-
-namespace MemberCenter.Web.Models.Newsletter;
-
-public sealed class PreferencesViewModel
-{
-    [Required]
-    public Guid ListId { get; set; }
-
-    [Required]
-    [EmailAddress]
-    public string Email { get; set; } = string.Empty;
-
-    public string PreferencesJson { get; set; } = "{}";
-}
diff --git a/src/MemberCenter.Web/Views/Home/Index.cshtml b/src/MemberCenter.Web/Views/Home/Index.cshtml
index d52490f..31056f3 100644
--- a/src/MemberCenter.Web/Views/Home/Index.cshtml
+++ b/src/MemberCenter.Web/Views/Home/Index.cshtml
@@ -1,2 +1,2 @@
 <h1>Member Center</h1>
-<p>Use this portal for account access and newsletter preferences.</p>
+<p>Use this portal for account access, profile management, addresses, and subscriptions.</p>
diff --git a/src/MemberCenter.Web/Views/Newsletter/Preferences.cshtml b/src/MemberCenter.Web/Views/Newsletter/Preferences.cshtml
deleted file mode 100644
index 3946aa0..0000000
--- a/src/MemberCenter.Web/Views/Newsletter/Preferences.cshtml
+++ /dev/null
@@ -1,11 +0,0 @@
-@model MemberCenter.Web.Models.Newsletter.PreferencesViewModel
-
-<h1>Preferences</h1>
-<form method="post">
-  <input asp-for="ListId" type="hidden" />
-  <input asp-for="Email" type="hidden" />
-  <label>Preferences JSON</label>
-  <textarea asp-for="PreferencesJson" rows="6"></textarea>
-  <span asp-validation-for="PreferencesJson"></span>
-  <button type="submit">Save</button>
-</form>
diff --git a/src/MemberCenter.Web/Views/Newsletter/PreferencesResult.cshtml b/src/MemberCenter.Web/Views/Newsletter/PreferencesResult.cshtml
deleted file mode 100644
index a6b49ce..0000000
--- a/src/MemberCenter.Web/Views/Newsletter/PreferencesResult.cshtml
+++ /dev/null
@@ -1,2 +0,0 @@
-<h1>Preferences</h1>
-<p>@(ViewData["Result"] ?? "Done")</p>
diff --git a/src/MemberCenter.Web/Views/Shared/_Layout.cshtml b/src/MemberCenter.Web/Views/Shared/_Layout.cshtml
index 54d39c9..42d009b 100644
--- a/src/MemberCenter.Web/Views/Shared/_Layout.cshtml
+++ b/src/MemberCenter.Web/Views/Shared/_Layout.cshtml
@@ -38,7 +38,6 @@
             <a asp-area="" asp-controller="Profile" asp-action="Index">Profile</a>
             <a asp-area="" asp-controller="Profile" asp-action="Addresses">Addresses</a>
             <a asp-area="" asp-controller="Profile" asp-action="Subscriptions">Subscriptions</a>
-            <a asp-area="" asp-controller="Newsletter" asp-action="Preferences">Preferences</a>
           </div>
         </div>
         @if (User.IsInRole("admin") || User.IsInRole("superuser"))