diff --git a/frontend/src/pages/idea/_components/GeneratingIdea.tsx b/frontend/src/pages/idea/_components/GeneratingIdea.tsx
index e2824fa..950adc6 100644
--- a/frontend/src/pages/idea/_components/GeneratingIdea.tsx
+++ b/frontend/src/pages/idea/_components/GeneratingIdea.tsx
@@ -23,6 +23,8 @@ export const GeneratingIdea = () => {
     const [keyword, setKeyword] = useState('')
     const [additionalInfo, setAdditionalInfo] = useState('')
     const [selectedOption, setSelectedOption] = useState('')
+    const [isKeywordLimit, setIsKeywordLimit] = useState(false)
+    const [isExtraLimit, setIsExtraLimit] = useState(false)
 
     const hasTrackedKeywordFocus = useRef(false)
     const hasTrackedAdditionalFocus = useRef(false)
@@ -153,6 +155,7 @@ export const GeneratingIdea = () => {
                         id="keyword-input"
                         value={keyword}
                         onChange={(value) => setKeyword(value)}
+                        onLimitChange={setIsKeywordLimit}
                         onFocus={handleKeywordFocus}
                         title="키워드"
                         placeholder="생각나는 키워드를 입력해주세요. (예: 바이브코딩, 도쿄 여행, 가을 메이크업)"
@@ -161,8 +164,9 @@ export const GeneratingIdea = () => {
                     />
 
                     <div
-                        className={`flex flex-col p-4 items-start gap-2 rounded-lg bg-surface-elevate-l2 relative border self-stretch ${isDropdownOpen ? ' border-gray-400' : 'border-transparent'
-                            }`}
+                        className={`flex flex-col p-4 items-start gap-2 rounded-lg bg-surface-elevate-l2 relative border self-stretch ${
+                            isDropdownOpen ? ' border-gray-400' : 'border-transparent'
+                        }`}
                     >
                         <div className="font-caption-14m text-gray-600">영상형식</div>
                         <div
@@ -192,6 +196,7 @@ export const GeneratingIdea = () => {
                     id="additional-info-input"
                     value={additionalInfo}
                     onChange={(value) => setAdditionalInfo(value)}
+                    onLimitChange={setIsExtraLimit}
                     onFocus={handleAdditionalFocus}
                     title="추가 입력 사항"
                     placeholder="어떤 점을 강조하고 싶으신가요? (예: 쉬운 설명, 유머, 영상미)"
@@ -201,10 +206,10 @@ export const GeneratingIdea = () => {
                 />
 
                 <button
-                    className="flex h-[48px] px-2 py-4 justify-center items-center gap-2 rounded-2xl 
-                                bg-primary-500 hover:bg-primary-opacity50 font-body-16b text-gray-900 text-center cursor-pointer"
+                    className="flex h-12 px-2 py-4 justify-center items-center gap-2 rounded-2xl 
+                                bg-primary-500 hover:bg-primary-opacity50 font-body-16b text-gray-900 text-center cursor-pointer disabled:bg-gray-300"
                     onClick={handleSubmitClick}
-                    disabled={isPending}
+                    disabled={isPending || isKeywordLimit || isExtraLimit}
                 >
                     콘텐츠 아이디어 생성하기
                 </button>
diff --git a/frontend/src/pages/idea/_components/TextareaWithLimit.tsx b/frontend/src/pages/idea/_components/TextareaWithLimit.tsx
index e18bfae..9b75f26 100644
--- a/frontend/src/pages/idea/_components/TextareaWithLimit.tsx
+++ b/frontend/src/pages/idea/_components/TextareaWithLimit.tsx
@@ -4,6 +4,7 @@ interface TextareaWithLimitProps {
     id: string
     value: string // textarea의 값
     onChange: (value: string) => void // 사용자가 입력한 텍스트가 변경될 때 호출되는 함수
+    onLimitChange: (value: boolean) => void
     title: string
     placeholder?: string
     initialRows?: number // row 개수로 textarea 박스의 초기 높이를 지정할 수 있습니다. 디폴트는 1
@@ -17,6 +18,7 @@ const TextareaWithLimit = ({
     id,
     value,
     onChange,
+    onLimitChange,
     title,
     placeholder,
     initialRows = 1,
@@ -44,7 +46,8 @@ const TextareaWithLimit = ({
     return (
         <div
             className={`flex flex-col p-4 gap-2 items-start
-                border bg-surface-elevate-l2 rounded-lg   ${inputCount > limitLength ? 'border-error' : isFocused ? 'border-gray-400' : 'border-transparent'
+                border bg-surface-elevate-l2 rounded-lg   ${
+                    inputCount > limitLength ? 'border-error' : isFocused ? 'border-gray-400' : 'border-transparent'
                 } 
             `}
         >
@@ -60,8 +63,10 @@ const TextareaWithLimit = ({
                 value={value}
                 disabled={disabled}
                 onChange={(e) => {
-                    onChange(e.target.value)
-                    onInputHandler(e.target.value)
+                    const newValue = e.target.value
+                    onChange(newValue)
+                    onInputHandler(newValue)
+                    onLimitChange(newValue.length > limitLength)
                 }}
                 onFocus={handleFocus}
                 onBlur={() => setIsFocused(false)}