diff --git a/src/app/features/dashboard_Id/Card/Card.tsx b/src/app/features/dashboard_Id/Card/Card.tsx
index d44573b..cdfe541 100644
--- a/src/app/features/dashboard_Id/Card/Card.tsx
+++ b/src/app/features/dashboard_Id/Card/Card.tsx
@@ -33,7 +33,7 @@ export default function Card({
       draggable="true"
       onDragStart={() => setDraggingCard({ cardData: card })}
       onContextMenu={(e: React.MouseEvent) => e.preventDefault()}
-      className="BG-white Border-section relative rounded-6 border-solid px-20 py-16"
+      className="BG-white Border-section relative rounded-6 border-solid px-20 py-16 transition-transform duration-300 ease-in-out hover:scale-95"
       onClick={() => setOpenCard(true)}
     >
       <div className="mobile:flex-col tablet:flex tablet:w-full tablet:items-center tablet:gap-20">
diff --git a/src/app/features/dashboard_Id/Card/cardFormModals/CreateCardForm.tsx b/src/app/features/dashboard_Id/Card/cardFormModals/CreateCardForm.tsx
index c813b1b..d5e4518 100644
--- a/src/app/features/dashboard_Id/Card/cardFormModals/CreateCardForm.tsx
+++ b/src/app/features/dashboard_Id/Card/cardFormModals/CreateCardForm.tsx
@@ -16,7 +16,6 @@ import { Assignee } from '../../type/Card.type'
 import type { CardFormData } from '../../type/CardFormData.type'
 import MyAssignee from '../MyAssignee'
 import TagsCanDelete from '../TagsCanDelete'
-// import AssigneeList, { Assignee } from './AssigneeList'
 import AssigneeList from './AssigneeList'
 import DateInput from './input/DateInput'
 import Input from './input/Input'
@@ -170,6 +169,7 @@ export default function CreateCardForm({
           className="Input h-126 resize-none"
           id="description"
           placeholder="설명을 입력해 주세요"
+          maxLength={250}
         />
       </Input>
 
@@ -209,6 +209,7 @@ export default function CreateCardForm({
             onKeyDown={(e) => {
               if (e.key === 'Enter') {
                 e.preventDefault()
+                if (e.nativeEvent.isComposing) return //현재 단어가 composition 중인지 체크하여, 이벤트 중복 발생을 방지.(한글 입력 시 마지막 글자 남는 문제 해결)
                 if (tagInput.trim() === '') return
                 if (!tags.includes(tagInput.trimEnd())) {
                   setTags((prev) => [...prev, tagInput.trim()]) // 중복 태그가 아니면 ok, 태그배열에 추가 및 입력창 초기화
@@ -217,7 +218,13 @@ export default function CreateCardForm({
               }
             }}
             value={tagInput}
-            onChange={(e) => setTagInput(e.target.value)}
+            onChange={(e) => {
+              const value = e.target.value
+              const allowed = /^[ㄱ-ㅎㅏ-ㅣ가-힣a-zA-Z\s]*$/
+              if (allowed.test(value)) {
+                setTagInput(value)
+              }
+            }}
           />
 
           {/* 추가한 태그 */}
diff --git a/src/app/features/dashboard_Id/Card/cardFormModals/ModifyCardForm.tsx b/src/app/features/dashboard_Id/Card/cardFormModals/ModifyCardForm.tsx
index ffe4dac..86d8597 100644
--- a/src/app/features/dashboard_Id/Card/cardFormModals/ModifyCardForm.tsx
+++ b/src/app/features/dashboard_Id/Card/cardFormModals/ModifyCardForm.tsx
@@ -237,6 +237,7 @@ export default function ModifyCardForm({
           {...register('description', {
             required: '설명을 입력해 주세요',
           })}
+          maxLength={250}
           className="Input h-126 resize-none"
           id="description"
           placeholder="설명을 입력해 주세요"
@@ -279,6 +280,7 @@ export default function ModifyCardForm({
             onKeyDown={(e) => {
               if (e.key === 'Enter') {
                 e.preventDefault()
+                if (e.nativeEvent.isComposing) return
                 if (tagInput.trim() === '') return
                 if (!tags.includes(tagInput.trimEnd())) {
                   setTags((prev) => [...prev, tagInput.trim()]) // 중복 태그가 아니면 ok, 태그배열에 추가 및 입력창 초기화
@@ -287,7 +289,13 @@ export default function ModifyCardForm({
               }
             }}
             value={tagInput}
-            onChange={(e) => setTagInput(e.target.value)}
+            onChange={(e) => {
+              const value = e.target.value
+              const allowed = /^[ㄱ-ㅎㅏ-ㅣ가-힣a-zA-Z\s]*$/
+              if (allowed.test(value)) {
+                setTagInput(value)
+              }
+            }}
           />
 
           {/* 추가한 태그 */}
diff --git a/src/app/features/dashboard_Id/Card/cardModal/CardContent.tsx b/src/app/features/dashboard_Id/Card/cardModal/CardContent.tsx
index f6f1e87..8caa7d1 100644
--- a/src/app/features/dashboard_Id/Card/cardModal/CardContent.tsx
+++ b/src/app/features/dashboard_Id/Card/cardModal/CardContent.tsx
@@ -1,6 +1,6 @@
 import Image from 'next/image'
 import { useTheme } from 'next-themes'
-import { useRef, useState } from 'react'
+import { useRef } from 'react'
 
 import { Avatar } from '@/app/shared/components/common/Avatar'
 import Dropdown from '@/app/shared/components/common/Dropdown/Dropdown'
@@ -128,7 +128,7 @@ export default function CardContent({
             {card.description && (
               <p
                 className={
-                  'font-regular Text-black mb-16 text-14 mobile:mb-32 mobile:text-12'
+                  'font-regular Text-black mb-16 whitespace-pre-line text-14 mobile:mb-32 mobile:text-12'
                 }
               >
                 {card.description}
diff --git a/src/app/features/dashboard_Id/hooks/useInfiniteScroll.ts b/src/app/features/dashboard_Id/hooks/useInfiniteScroll.ts
index e86b9b2..f1b2b65 100644
--- a/src/app/features/dashboard_Id/hooks/useInfiniteScroll.ts
+++ b/src/app/features/dashboard_Id/hooks/useInfiniteScroll.ts
@@ -1,5 +1,7 @@
 import { useCallback, useEffect } from 'react'
 
+import { useIsMobile } from '@/app/shared/hooks/useIsmobile'
+
 /**
  * 범용 무한스크롤 훅
  *
@@ -22,7 +24,8 @@ export const useInfiniteScroll = (
     const clientHeight = targetRef?.current?.clientHeight ?? window.innerHeight
 
     const scrollPercentage = (scrollTop + clientHeight) / scrollHeight
-    const isNearBottom = scrollPercentage >= 0.8
+
+    const isNearBottom = scrollPercentage >= 0.7
 
     if (isNearBottom && hasNextPage && !isFetchingNextPage) {
       fetchNextPage()