diff --git a/Source/Process.ts b/Source/Process.ts
index 892c9a3..38fc031 100644
--- a/Source/Process.ts
+++ b/Source/Process.ts
@@ -1492,6 +1492,78 @@ export class Process {
       const responseJSON = await response.json();
       return new Result(true, "获得统计数据成功", responseJSON);
     },
+    SetUserSettings: async (Data: object): Promise<Result> => {
+      // Enforce a maximum allowed size for the settings payload to avoid
+      // excessively large entries being written to D1.
+      const MAX_SETTINGS_LENGTH = 10000;
+
+      ThrowErrorIfFailed(this.CheckParams(Data, {
+        "Settings": "string"
+      }));
+
+      const SettingsString = Data["Settings"];
+      if (typeof SettingsString !== "string") {
+        return new Result(false, "设置格式有误");
+      }
+      if (SettingsString.length > MAX_SETTINGS_LENGTH) {
+        return new Result(false, "设置内容过大");
+      }
+
+      let SettingsObject: object;
+      try {
+        SettingsObject = JSON.parse(SettingsString);
+      } catch (_) {
+        return new Result(false, "设置格式有误");
+      }
+      if (typeof SettingsObject !== "object" || Array.isArray(SettingsObject) || SettingsObject === null) {
+        return new Result(false, "设置格式有误");
+      }
+      try {
+        // Try to insert first. If a unique/primary key constraint is hit (row already exists),
+        // fall back to updating the existing row. This avoids a non-atomic check-then-insert flow.
+        ThrowErrorIfFailed(await this.XMOJDatabase.Insert("user_settings", {
+          user_id: this.Username,
+          settings: SettingsString
+        }));
+      } catch (e) {
+        const errorMessage = e instanceof Error ? e.message : (typeof e === "object" && e !== null && "Message" in e ? String((e as { Message?: unknown }).Message) : String(e));
+        if (/UNIQUE|constraint|duplicate/i.test(errorMessage)) {
+          // Row for this user_id already exists, perform an update instead.
+          ThrowErrorIfFailed(await this.XMOJDatabase.Update("user_settings", {
+            settings: SettingsString
+          }, {
+            user_id: this.Username
+          }));
+        } else {
+          // Propagate non-uniqueness errors.
+          throw e;
+        }
+      }
+      return new Result(true, "保存设置成功");
+    },
+    GetUserSettings: async (Data: object): Promise<Result> => {
+      ThrowErrorIfFailed(this.CheckParams(Data, {}));
+      const SettingsData = ThrowErrorIfFailed(await this.XMOJDatabase.Select("user_settings", ["settings"], {
+        user_id: this.Username
+      }));
+      if (SettingsData.length === 0) {
+        return new Result(true, "获得设置成功", {
+          "Settings": {}
+        });
+      }
+      let SettingsObject: object;
+      try {
+        SettingsObject = JSON.parse(SettingsData[0]["settings"]);
+      } catch (_) {
+        return new Result(false, "设置数据损坏");
+      }
+      if (typeof SettingsObject !== "object" || Array.isArray(SettingsObject) || SettingsObject === null) {
+        return new Result(false, "设置数据损坏");
+      }
+      return new Result(true, "获得设置成功", {
+        "Settings": SettingsObject
+      });
+    },
     LastOnline: async (Data: object): Promise<Result> => {
       ThrowErrorIfFailed(this.CheckParams(Data, {
         "Username": "string"
diff --git a/migrations/0004_add_user_settings.sql b/migrations/0004_add_user_settings.sql
new file mode 100644
index 0000000..6c62c06
--- /dev/null
+++ b/migrations/0004_add_user_settings.sql
@@ -0,0 +1,6 @@
+-- Migration number: 0004 	 2026-03-22
+
+CREATE TABLE IF NOT EXISTS user_settings (
+    user_id TEXT PRIMARY KEY NOT NULL,
+    settings TEXT NOT NULL DEFAULT '{}'
+);
diff --git a/test/process.test.js b/test/process.test.js
index 58cf9d4..1ada256 100644
--- a/test/process.test.js
+++ b/test/process.test.js
@@ -399,3 +399,107 @@ test('AddBBSMention pushes full mention payload for websocket clients', async ()
     });
     assert.strictEqual(typeof pushedBody.notification.data.MentionTime, 'number');
 });
+
+test('SetUserSettings creates new settings row when none exists', async () => {
+    const insertedRows = [];
+    const proc = createProcess({
+        db: {
+            GetTableSize: async () => new Result(true, '', { TableSize: 0 }),
+            Insert: async (table, data) => {
+                insertedRows.push({ table, data });
+                return new Result(true, '', { InsertID: 1 });
+            }
+        }
+    });
+    const result = await proc.ProcessFunctions['SetUserSettings']({ Settings: '{"Discussion":"true","Theme":"dark"}' });
+    assert.ok(result.Success);
+    assert.strictEqual(result.Message, '保存设置成功');
+    assert.strictEqual(insertedRows.length, 1);
+    assert.strictEqual(insertedRows[0].table, 'user_settings');
+    assert.strictEqual(insertedRows[0].data.user_id, 'testuser');
+    assert.strictEqual(insertedRows[0].data.settings, '{"Discussion":"true","Theme":"dark"}');
+});
+
+test('SetUserSettings updates existing settings row', async () => {
+    const updatedRows = [];
+    const proc = createProcess({
+        db: {
+            Insert: async () => {
+                // Simulate a primary key conflict (row already exists)
+                throw new Error('UNIQUE constraint failed: user_settings.user_id');
+            },
+            Update: async (table, data, where) => {
+                updatedRows.push({ table, data, where });
+                return new Result(true, '');
+            }
+        }
+    });
+    const result = await proc.ProcessFunctions['SetUserSettings']({ Settings: '{"Discussion":"false"}' });
+    assert.ok(result.Success);
+    assert.strictEqual(result.Message, '保存设置成功');
+    assert.strictEqual(updatedRows.length, 1);
+    assert.strictEqual(updatedRows[0].table, 'user_settings');
+    assert.strictEqual(updatedRows[0].data.settings, '{"Discussion":"false"}');
+    assert.deepStrictEqual(updatedRows[0].where, { user_id: 'testuser' });
+});
+
+test('SetUserSettings fails with invalid JSON', async () => {
+    const proc = createProcess();
+    const result = await proc.ProcessFunctions['SetUserSettings']({ Settings: 'not-json' });
+    assert.strictEqual(result.Success, false);
+    assert.strictEqual(result.Message, '设置格式有误');
+});
+
+test('SetUserSettings fails when Settings is an array', async () => {
+    const proc = createProcess();
+    const result = await proc.ProcessFunctions['SetUserSettings']({ Settings: '["a","b"]' });
+    assert.strictEqual(result.Success, false);
+    assert.strictEqual(result.Message, '设置格式有误');
+});
+
+test('GetUserSettings returns empty object when no settings stored', async () => {
+    const proc = createProcess({
+        db: {
+            Select: async () => new Result(true, '', [])
+        }
+    });
+    const result = await proc.ProcessFunctions['GetUserSettings']({});
+    assert.ok(result.Success);
+    assert.strictEqual(result.Message, '获得设置成功');
+    assert.deepStrictEqual(result.Data.Settings, {});
+});
+
+test('GetUserSettings returns stored settings', async () => {
+    const proc = createProcess({
+        db: {
+            Select: async () => new Result(true, '', [{ settings: '{"Discussion":"true","Theme":"dark"}' }])
+        }
+    });
+    const result = await proc.ProcessFunctions['GetUserSettings']({});
+    assert.ok(result.Success);
+    assert.strictEqual(result.Message, '获得设置成功');
+    assert.deepStrictEqual(result.Data.Settings, { Discussion: 'true', Theme: 'dark' });
+});
+
+test('GetUserSettings fails when stored settings JSON is corrupted', async () => {
+    const proc = createProcess({
+        db: {
+            Select: async () => new Result(true, '', [{ settings: 'corrupted{json' }])
+        }
+    });
+    const result = await proc.ProcessFunctions['GetUserSettings']({});
+    assert.strictEqual(result.Success, false);
+    assert.strictEqual(result.Message, '设置数据损坏');
+});
+
+test('GetUserSettings fails when stored settings JSON is valid but not an object', async () => {
+    const proc = createProcess({
+        db: {
+            // settings is valid JSON (an array) but not an object
+            Select: async () => new Result(true, '', [{ settings: '["a","b"]' }])
+        }
+    });
+    const result = await proc.ProcessFunctions['GetUserSettings']({});
+    assert.strictEqual(result.Success, false);
+    assert.strictEqual(result.Message, '设置数据损坏');
+});