diff --git a/app/entities/common/Overlay/Image/ImageZoomOverlayContainer.tsx b/app/entities/common/Overlay/Image/ImageZoomOverlayContainer.tsx
index 41b0ae1..2a3d7bb 100644
--- a/app/entities/common/Overlay/Image/ImageZoomOverlayContainer.tsx
+++ b/app/entities/common/Overlay/Image/ImageZoomOverlayContainer.tsx
@@ -14,7 +14,7 @@ const ImageZoomOverlayContainer = ({
   if (!selectedImage) return null;
 
   return (
-    <div className={'zoomBox p-4 bg-white'}>
+    <div className={'w-full zoomBox p-4 bg-white rounded-md shadow-lg'}>
       <button
         onClick={() => {
           setSelectedImage(null);
@@ -29,7 +29,7 @@ const ImageZoomOverlayContainer = ({
         alt={'확대된 이미지'}
         width={800}
         height={600}
-        className={'rounded-none !important max-w-full max-h-[80vh]'}
+        className={'rounded-none !important w-full h-auto mx-auto'}
       />
     </div>
   );
diff --git a/app/entities/common/Overlay/Overlay.tsx b/app/entities/common/Overlay/Overlay.tsx
index e084823..45089ae 100644
--- a/app/entities/common/Overlay/Overlay.tsx
+++ b/app/entities/common/Overlay/Overlay.tsx
@@ -4,11 +4,13 @@ interface OverlayProps {
   overlayOpen: boolean;
   setOverlayOpen: (open: boolean) => void;
   children: ReactNode;
+  maxWidth?: 'xl' | '2xl' | '3xl' | '4xl' | '5xl' | '6xl' | '7xl' | number;
 }
 const Overlay = ({
   overlayOpen = false,
   setOverlayOpen,
   children,
+  maxWidth = '2xl',
 }: OverlayProps) => {
   const overlayRef = useRef<HTMLDivElement>(null);
   useEffect(() => {
@@ -24,13 +26,17 @@ const Overlay = ({
     };
   }, []);
 
+  const isMaxWidthTypeNumber = typeof maxWidth === 'number';
+
   return (
     overlayOpen && (
       <div
         ref={overlayRef}
         className="fixed flex justify-center items-center w-screen h-screen top-0 left-0 inset-0 bg-black bg-opacity-50 z-50"
       >
-        <div className="animate-popUp  container bg-opacity-90 text-overlay rounded-lg mx-auto max-w-2xl">
+        <div
+          className={`animate-popUp  container bg-opacity-90 text-overlay rounded-lg mx-auto ${isMaxWidthTypeNumber ? `max-w-[${maxWidth}px]` : `max-w-${maxWidth}`}`}
+        >
           {children}
         </div>
       </div>
diff --git a/app/entities/post/detail/PostBody.tsx b/app/entities/post/detail/PostBody.tsx
index 5a654ef..707a997 100644
--- a/app/entities/post/detail/PostBody.tsx
+++ b/app/entities/post/detail/PostBody.tsx
@@ -42,6 +42,42 @@ const PostBody = ({ content, tags, loading }: Props) => {
     }
   };
 
+  const addDescriptionUnderImage = (
+    node: any,
+    index?: number,
+    parent?: Element
+  ) => {
+    if (node.type === 'element' && node.tagName === 'img') {
+      const altText = node.properties.alt;
+      if (altText) {
+        const descriptionNode = {
+          type: 'element',
+          tagName: 'span',
+          properties: {
+            className: 'image-description',
+          },
+          children: [
+            {
+              type: 'text',
+              value: altText,
+            },
+          ],
+        };
+
+        if (
+          index !== undefined &&
+          parent &&
+          parent.children &&
+          Array.isArray(parent.children)
+        ) {
+          parent.children.splice(index + 1, 0, descriptionNode);
+        }
+      }
+    }
+
+    return null;
+  };
+
   const renderOpenGraph = (node: any, index?: number, parent?: Element) => {
     if (node.type === 'element' && node.tagName === 'p' && node.children) {
       const aTag = node.children.find(
@@ -226,7 +262,11 @@ const PostBody = ({ content, tags, loading }: Props) => {
         </div>
       ) : (
         <>
-          <Overlay overlayOpen={openImageBox} setOverlayOpen={setOpenImageBox}>
+          <Overlay
+            overlayOpen={openImageBox}
+            setOverlayOpen={setOpenImageBox}
+            maxWidth={'5xl'}
+          >
             <ImageZoomOverlayContainer
               selectedImage={selectedImage}
               setSelectedImage={setSelectedImage}
@@ -253,6 +293,11 @@ const PostBody = ({ content, tags, loading }: Props) => {
                 parent as Element | undefined
               );
               addImageClickHandler(node);
+              addDescriptionUnderImage(
+                node,
+                index,
+                parent as Element | undefined
+              );
             }}
           />
         </>
diff --git a/app/globals.css b/app/globals.css
index 930e76f..314afc3 100644
--- a/app/globals.css
+++ b/app/globals.css
@@ -82,13 +82,21 @@ article.post .post-body p:has(img) {
 }
 
 article.post .post-body img {
-  max-width: 100%;
+  max-width: 90%;
   height: auto;
   margin: 1em 0;
   border-radius: 1em;
   box-shadow: 0 0 4px rgba(0, 0, 0, 0.05);
 }
 
+article.post .post-body div > div img {
+  max-width: 50%;
+}
+
+article.post .post-body div > div.zoomBox img {
+  max-width: 100%;
+}
+
 article.post .post-body .zoomBox img {
   border-radius: 0;
 }
@@ -175,6 +183,15 @@ article.post .post-body pre {
   box-shadow: 0 0 4px rgba(0, 0, 0, 0.05);
 }
 
+article.post .image-description {
+  text-align: center;
+  font-size: 0.75em;
+  color: var(--text-weak);
+  margin-top: -0.5em;
+  margin-bottom: 1em;
+  display: block;
+}
+
 .shadow-top {
   box-shadow:
     0 -4px 6px -1px rgba(0, 0, 0, 0.1),