diff --git a/src/main/ipc/folder.js b/src/main/ipc/folder.js
index 081d2aa..6f36724 100644
--- a/src/main/ipc/folder.js
+++ b/src/main/ipc/folder.js
@@ -57,6 +57,17 @@ function register(mainWindow) {
   });
 
   ipcMain.handle('reveal-folder', (_e, folderPath) => shell.openPath(folderPath));
+
+  ipcMain.handle('get-preview-on', () => {
+    const cfg = readConfig();
+    return cfg.previewOn !== false; // 기본값 true
+  });
+
+  ipcMain.handle('set-preview-on', (_e, on) => {
+    const cfg = readConfig();
+    cfg.previewOn = on;
+    writeConfig(cfg);
+  });
 }
 
 module.exports = { register };
\ No newline at end of file
diff --git a/src/preload/index.js b/src/preload/index.js
index 61bfdde..a99b63f 100644
--- a/src/preload/index.js
+++ b/src/preload/index.js
@@ -11,6 +11,8 @@ contextBridge.exposeInMainWorld('api', {
   setLastFolder:      (p)        => ipcRenderer.invoke('set-last-folder', p),
   listDirectories:    (p)        => ipcRenderer.invoke('list-directories', p),
   revealFolder:       (p)        => ipcRenderer.invoke('reveal-folder', p),
+  getPreviewOn:       ()         => ipcRenderer.invoke('get-preview-on'),
+  setPreviewOn:       (on)       => ipcRenderer.invoke('set-preview-on', on),
   checkFilesExist:    (folder, names) => ipcRenderer.invoke('check-files-exist', folder, names),
   moveFiles:          (args)     => ipcRenderer.invoke('move-files', args),
 });
diff --git a/src/renderer/index.html b/src/renderer/index.html
index 3b55b14..71aefaf 100644
--- a/src/renderer/index.html
+++ b/src/renderer/index.html
@@ -31,7 +31,7 @@
         <button class="sort-btn" id="btn-sort-date">날짜순</button>
       </div>
       <div class="separator"></div>
-      <button class="btn btn-info active" id="btn-preview-toggle">미리보기</button>
+      <button class="btn btn-info" id="btn-preview-toggle">미리보기</button>
     </nav>
 
     <form id="format-bar">
diff --git a/src/renderer/renderer.js b/src/renderer/renderer.js
index 3494466..d2bf384 100644
--- a/src/renderer/renderer.js
+++ b/src/renderer/renderer.js
@@ -64,10 +64,15 @@ window.api.onFullscreenChange((isFullscreen) => {
 
 // 앱 시작 시 마지막 폴더 또는 홈 디렉토리 로드
 (async () => {
-  const [lastFolder, homeDir] = await Promise.all([
+  const [lastFolder, homeDir, previewOn] = await Promise.all([
     window.api.getLastFolder(),
     window.api.getHomeDir(),
+    window.api.getPreviewOn(),
   ]);
+
+  btnPreviewToggle.classList.toggle('active', previewOn);
+  hoverPreview.setEnabled(previewOn);
+
   const target = lastFolder || homeDir;
   await fileExplorer.loadTree(homeDir, target);
   await loadFolder(target);
@@ -87,6 +92,7 @@ document.addEventListener('keydown', (e) => {
 btnPreviewToggle.addEventListener('click', () => {
   const on = btnPreviewToggle.classList.toggle('active');
   hoverPreview.setEnabled(on);
+  window.api.setPreviewOn(on);
 });
 btnSortName.addEventListener('click', () => sortFiles('name'));
 btnSortDate.addEventListener('click', () => sortFiles('date'));