diff --git a/internal/application/setting/setting.go b/internal/application/setting/setting.go
index f969edc..b6afe5b 100644
--- a/internal/application/setting/setting.go
+++ b/internal/application/setting/setting.go
@@ -22,6 +22,11 @@ type SettingContract interface {
 
 	GetFFplayPath() string
 	SetFFplayPath(path string)
+
+	ThemeInit()
+	GetThemes() map[string]ThemeInfoContract
+	GetTheme() ThemeInfoContract
+	SetTheme(themeInfo ThemeInfoContract)
 }
 
 type setting struct {
diff --git a/internal/application/setting/theme.go b/internal/application/setting/theme.go
new file mode 100644
index 0000000..b81547b
--- /dev/null
+++ b/internal/application/setting/theme.go
@@ -0,0 +1,110 @@
+package setting
+
+import (
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/lang"
+	"fyne.io/fyne/v2/theme"
+	"image/color"
+)
+
+func (s *setting) GetTheme() ThemeInfoContract {
+	name := s.fyneApp.Preferences().String("theme")
+	if name != "" {
+		if _, ok := s.GetThemes()[name]; ok {
+			return s.GetThemes()[name]
+		}
+	}
+
+	return s.GetThemes()["default"]
+}
+
+func (s *setting) SetTheme(themeInfo ThemeInfoContract) {
+	s.fyneApp.Preferences().SetString("theme", themeInfo.GetName())
+
+	if themeInfo.GetName() == "default" {
+		s.fyneApp.Settings().SetTheme(theme.DefaultTheme())
+		return
+	}
+	s.fyneApp.Settings().SetTheme(&forcedVariant{theme: theme.DefaultTheme(), variant: themeInfo.GetVariant()})
+}
+
+func (s *setting) ThemeInit() {
+	themeInfo := s.GetTheme()
+	if themeInfo.GetName() == "default" {
+		s.fyneApp.Settings().SetTheme(theme.DefaultTheme())
+		return
+	}
+	s.fyneApp.Settings().SetTheme(&forcedVariant{theme: theme.DefaultTheme(), variant: themeInfo.GetVariant()})
+}
+
+func (s *setting) GetThemes() map[string]ThemeInfoContract {
+	themesNameDefault := &themeInfo{
+		name:  "default",
+		title: lang.L("themesNameDefault"),
+	}
+
+	themesNameLight := &themeInfo{
+		name:    "light",
+		title:   lang.L("themesNameLight"),
+		variant: theme.VariantLight,
+	}
+
+	themesNameDark := &themeInfo{
+		name:    "dark",
+		title:   lang.L("themesNameDark"),
+		variant: theme.VariantDark,
+	}
+
+	list := map[string]ThemeInfoContract{
+		"default": themesNameDefault,
+		"light":   themesNameLight,
+		"dark":    themesNameDark,
+	}
+
+	return list
+}
+
+type ThemeInfoContract interface {
+	GetName() string
+	GetTitle() string
+	GetVariant() fyne.ThemeVariant
+}
+
+type themeInfo struct {
+	name    string
+	title   string
+	variant fyne.ThemeVariant
+}
+
+func (inf *themeInfo) GetName() string {
+	return inf.name
+}
+
+func (inf *themeInfo) GetTitle() string {
+	return inf.title
+}
+
+func (inf *themeInfo) GetVariant() fyne.ThemeVariant {
+	return inf.variant
+}
+
+type forcedVariant struct {
+	theme   fyne.Theme
+	variant fyne.ThemeVariant
+}
+
+func (f *forcedVariant) Color(name fyne.ThemeColorName, _ fyne.ThemeVariant) color.Color {
+	return f.theme.Color(name, f.variant)
+}
+
+func (f *forcedVariant) Font(style fyne.TextStyle) fyne.Resource {
+	return theme.DefaultTheme().Font(style)
+}
+
+func (f *forcedVariant) Icon(name fyne.ThemeIconName) fyne.Resource {
+	return theme.DefaultTheme().Icon(name)
+}
+
+func (f *forcedVariant) Size(name fyne.ThemeSizeName) float32 {
+	return theme.DefaultTheme().Size(name)
+}
diff --git a/internal/controller/menu.go b/internal/controller/menu.go
new file mode 100644
index 0000000..ec6dab3
--- /dev/null
+++ b/internal/controller/menu.go
@@ -0,0 +1,36 @@
+package controller
+
+import (
+	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/gui/view"
+)
+
+func (c *controller) actionSettingConvertor() {
+	c.settingConvertor(true)
+}
+
+func (c *controller) actionMainSettings() {
+	currentLang, _ := c.app.GetSetting().GetCurrentLangOrDefaultLang()
+	content := view.MainSettings(
+		currentLang,
+		c.app.GetSetting().GetLanguages(),
+
+		c.app.GetSetting().GetTheme(),
+		c.app.GetSetting().GetThemes(),
+
+		c.actionMainSettingsSave,
+		c.convertor,
+	)
+	c.window.SetContent(content)
+}
+
+func (c *controller) actionMainSettingsSave(setting *view.MainSettingForm) error {
+	err := c.app.GetSetting().SetLang(setting.Language)
+	if err != nil {
+		return err
+	}
+	c.app.GetSetting().SetTheme(setting.ThemeInfo)
+	c.initLayout()
+
+	c.convertor()
+	return nil
+}
diff --git a/internal/gui/view/mainSettings.go b/internal/gui/view/mainSettings.go
new file mode 100644
index 0000000..b9e19e7
--- /dev/null
+++ b/internal/gui/view/mainSettings.go
@@ -0,0 +1,92 @@
+package view
+
+import (
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/canvas"
+	"fyne.io/fyne/v2/lang"
+	"fyne.io/fyne/v2/widget"
+	"git.kor-elf.net/kor-elf/gui-for-ffmpeg/internal/application/setting"
+	"image/color"
+)
+
+type MainSettingForm struct {
+	Language  setting.Lang
+	ThemeInfo setting.ThemeInfoContract
+}
+
+func MainSettings(
+	currentLang setting.Lang,
+	langList []setting.Lang,
+
+	themeInfo setting.ThemeInfoContract,
+	themeList map[string]setting.ThemeInfoContract,
+
+	save func(form *MainSettingForm) error,
+	cancel func(),
+) fyne.CanvasObject {
+
+	errorMessage := canvas.NewText("", color.RGBA{R: 255, G: 0, B: 0, A: 255})
+	errorMessage.TextSize = 16
+	errorMessage.TextStyle = fyne.TextStyle{Bold: true}
+
+	viewSettingForm := &MainSettingForm{
+		Language:  currentLang,
+		ThemeInfo: themeInfo,
+	}
+
+	var languageItems []string
+	langByTitle := map[string]setting.Lang{}
+	for _, language := range langList {
+		languageItems = append(languageItems, language.Title)
+		langByTitle[language.Title] = language
+	}
+	selectLanguage := widget.NewSelect(languageItems, func(s string) {
+		if lang, ok := langByTitle[s]; ok {
+			viewSettingForm.Language = lang
+		}
+	})
+	selectLanguage.Selected = currentLang.Title
+
+	var themeItems []string
+	themeByTitle := map[string]setting.ThemeInfoContract{}
+	for _, themeInfo := range themeList {
+		themeItems = append(themeItems, themeInfo.GetTitle())
+		themeByTitle[themeInfo.GetTitle()] = themeInfo
+	}
+	selectTheme := widget.NewSelect(themeItems, func(s string) {
+		if themeInfo, ok := themeByTitle[s]; ok {
+			viewSettingForm.ThemeInfo = themeInfo
+		}
+	})
+	selectTheme.Selected = themeInfo.GetTitle()
+
+	form := &widget.Form{
+		Items: []*widget.FormItem{
+			{
+				Text:   lang.L("menuSettingsLanguage"),
+				Widget: selectLanguage,
+			},
+			{
+				Text:   lang.L("menuSettingsTheme"),
+				Widget: selectTheme,
+			},
+			{
+				Widget: errorMessage,
+			},
+		},
+		SubmitText: lang.L("save"),
+		OnSubmit: func() {
+			err := save(viewSettingForm)
+			if err != nil {
+				errorMessage.Text = err.Error()
+			}
+		},
+	}
+	if cancel != nil {
+		form.OnCancel = cancel
+		form.CancelText = lang.L("cancel")
+	}
+
+	messageHead := lang.L("settings")
+	return widget.NewCard(messageHead, "", form)
+}