diff --git a/src/features/settings/Settings.tsx b/src/features/settings/Settings.tsx
index a59155b..6e3ab6a 100644
--- a/src/features/settings/Settings.tsx
+++ b/src/features/settings/Settings.tsx
@@ -1,4 +1,5 @@
 import {
+  chakra,
   Box,
   Button,
   Center,
@@ -20,13 +21,15 @@ import {
   Text,
   VStack,
   useBreakpointValue,
+  useToast,
 } from '@chakra-ui/react';
 import { PanelQMCv2Key } from './panels/PanelQMCv2Key';
 import { useState } from 'react';
 import { MdExpandMore, MdMenu, MdOutlineSettingsBackupRestore } from 'react-icons/md';
-import { useAppDispatch } from '~/hooks';
+import { useAppDispatch, useAppSelector } from '~/hooks';
 import { commitStagingChange, discardStagingChanges } from './settingsSlice';
 import { PanelKWMv2Key } from './panels/PanelKWMv2Key';
+import { selectIsSettingsNotSaved } from './settingsSelector';
 
 const TABS: { name: string; Tab: () => JSX.Element }[] = [
   { name: 'QMCv2 密钥', Tab: PanelQMCv2Key },
@@ -38,6 +41,7 @@ const TABS: { name: string; Tab: () => JSX.Element }[] = [
 ];
 
 export function Settings() {
+  const toast = useToast();
   const dispatch = useAppDispatch();
   const isLargeWidthDevice =
     useBreakpointValue({
@@ -49,8 +53,25 @@ export function Settings() {
   const handleTabChange = (idx: number) => {
     setTabIndex(idx);
   };
-  const handleResetSettings = () => dispatch(discardStagingChanges());
-  const handleApplySettings = () => dispatch(commitStagingChange());
+  const handleResetSettings = () => {
+    dispatch(discardStagingChanges());
+
+    toast({
+      status: 'info',
+      title: '未储存的设定已舍弃',
+      description: '已还原到更改前的状态。',
+      isClosable: true,
+    });
+  };
+  const handleApplySettings = () => {
+    dispatch(commitStagingChange());
+    toast({
+      status: 'success',
+      title: '设定已应用',
+      isClosable: true,
+    });
+  };
+  const isSettingsNotSaved = useAppSelector(selectIsSettingsNotSaved);
 
   return (
     <Flex flexDir="column" flex={1}>
@@ -104,7 +125,16 @@ export function Settings() {
               <VStack mt="4" alignItems="flex-start" w="full">
                 <Flex flexDir="row" gap="2" w="full">
                   <Center>
-                    <Box color="gray">设置会在保存后生效。</Box>
+                    {isSettingsNotSaved ? (
+                      <Box color="gray">
+                        有未储存的更改{' '}
+                        <chakra.span color="red" wordBreak="keep-all">
+                          设定将在保存后生效
+                        </chakra.span>
+                      </Box>
+                    ) : (
+                      <Box color="gray">设定将在保存后生效</Box>
+                    )}
                   </Center>
                   <Spacer />
                   <HStack gap="2" justifyContent="flex-end">
diff --git a/src/features/settings/settingsSelector.ts b/src/features/settings/settingsSelector.ts
index 7e2a038..6b695e5 100644
--- a/src/features/settings/settingsSelector.ts
+++ b/src/features/settings/settingsSelector.ts
@@ -4,6 +4,8 @@ import { closestByLevenshtein } from '~/util/levenshtein';
 import { hasOwn } from '~/util/objects';
 import { kwm2StagingToProductionKey } from './keyFormats';
 
+export const selectIsSettingsNotSaved = (state: RootState) => state.settings.dirty;
+
 export const selectStagingQMCv2Settings = (state: RootState) => state.settings.staging.qmc2;
 export const selectFinalQMCv2Settings = (state: RootState) => state.settings.production.qmc2;
 
diff --git a/src/features/settings/settingsSlice.ts b/src/features/settings/settingsSlice.ts
index e5722e2..10bbaf1 100644
--- a/src/features/settings/settingsSlice.ts
+++ b/src/features/settings/settingsSlice.ts
@@ -37,16 +37,18 @@ export interface ProductionSettings {
 }
 
 export interface SettingsState {
+  dirty: boolean;
   staging: StagingSettings;
   production: ProductionSettings;
 }
 const initialState: SettingsState = {
+  dirty: false,
   staging: {
-    qmc2: { allowFuzzyNameSearch: false, keys: [] },
+    qmc2: { allowFuzzyNameSearch: true, keys: [] },
     kwm2: { keys: [] },
   },
   production: {
-    qmc2: { allowFuzzyNameSearch: false, keys: {} },
+    qmc2: { allowFuzzyNameSearch: true, keys: {} },
     kwm2: { keys: {} },
   },
 };
@@ -77,6 +79,7 @@ export const settingsSlice = createSlice({
   reducers: {
     setProductionChanges: (_state, { payload }: PayloadAction<ProductionSettings>) => {
       return {
+        dirty: false,
         production: payload,
         staging: productionToStaging(payload),
       };
@@ -84,14 +87,17 @@ export const settingsSlice = createSlice({
     //
     qmc2AddKey(state) {
       state.staging.qmc2.keys.push({ id: nanoid(), name: '', ekey: '' });
+      state.dirty = true;
     },
     qmc2ImportKeys(state, { payload }: PayloadAction<Omit<StagingQMCv2Key, 'id'>[]>) {
       const newItems = payload.map((item) => ({ id: nanoid(), ...item }));
       state.staging.qmc2.keys.push(...newItems);
+      state.dirty = true;
     },
     qmc2DeleteKey(state, { payload: { id } }: PayloadAction<{ id: string }>) {
       const qmc2 = state.staging.qmc2;
       qmc2.keys = qmc2.keys.filter((item) => item.id !== id);
+      state.dirty = true;
     },
     qmc2UpdateKey(
       state,
@@ -100,25 +106,31 @@ export const settingsSlice = createSlice({
       const keyItem = state.staging.qmc2.keys.find((item) => item.id === id);
       if (keyItem) {
         keyItem[field] = value;
+        state.dirty = true;
       }
     },
     qmc2ClearKeys(state) {
       state.staging.qmc2.keys = [];
+      state.dirty = true;
     },
     qmc2AllowFuzzyNameSearch(state, { payload: { enable } }: PayloadAction<{ enable: boolean }>) {
       state.staging.qmc2.allowFuzzyNameSearch = enable;
+      state.dirty = true;
     },
     // TODO: reuse the logic somehow?
     kwm2AddKey(state) {
       state.staging.kwm2.keys.push({ id: nanoid(), ekey: '', quality: '', rid: '' });
+      state.dirty = true;
     },
     kwm2ImportKeys(state, { payload }: PayloadAction<Omit<StagingKWMv2Key, 'id'>[]>) {
       const newItems = payload.map((item) => ({ id: nanoid(), ...item }));
       state.staging.kwm2.keys.push(...newItems);
+      state.dirty = true;
     },
     kwm2DeleteKey(state, { payload: { id } }: PayloadAction<{ id: string }>) {
       const kwm2 = state.staging.kwm2;
       kwm2.keys = kwm2.keys.filter((item) => item.id !== id);
+      state.dirty = true;
     },
     kwm2UpdateKey(
       state,
@@ -127,18 +139,22 @@ export const settingsSlice = createSlice({
       const keyItem = state.staging.kwm2.keys.find((item) => item.id === id);
       if (keyItem) {
         keyItem[field] = value;
+        state.dirty = true;
       }
     },
     kwm2ClearKeys(state) {
       state.staging.kwm2.keys = [];
+      state.dirty = true;
     },
     //
     discardStagingChanges: (state) => {
+      state.dirty = false;
       state.staging = productionToStaging(state.production);
     },
     commitStagingChange: (state) => {
       const production = stagingToProduction(state.staging);
       return {
+        dirty: false,
         // Sync back to staging
         staging: productionToStaging(production),
         production,