diff --git a/src/components/ui/dropdown/dropdown.stories.tsx b/src/components/ui/dropdown/dropdown.stories.tsx
index 47b3e9c..e0c215c 100644
--- a/src/components/ui/dropdown/dropdown.stories.tsx
+++ b/src/components/ui/dropdown/dropdown.stories.tsx
@@ -12,7 +12,7 @@ const meta: Meta<typeof Dropdown> = {
   tags: ['autodocs'],
   args: {
     name: 'status',
-    areaLabel: '카테고리',
+    ariaLabel: '카테고리',
     placeholder: '카테고리를 선택하세요',
     values: CATEGORY_CODE, // 기본값
   },
@@ -44,6 +44,6 @@ export const Small: Story = {
 
 export const WithDefaultValue: Story = {
   args: {
-    defaultValue: CATEGORY_CODE[1],
+    selected: CATEGORY_CODE[1],
   },
 };
diff --git a/src/components/ui/dropdown/dropdown.styles.ts b/src/components/ui/dropdown/dropdown.styles.ts
index b0fe9be..17537db 100644
--- a/src/components/ui/dropdown/dropdown.styles.ts
+++ b/src/components/ui/dropdown/dropdown.styles.ts
@@ -1,5 +1,5 @@
 export const DROPDOWN_STYLE = {
-  base: 'flex-1 text-left min-w-[110px] focus-visible:outline-red-300',
+  base: 'relative flex-1 text-left min-w-[110px] focus-visible:outline-red-300',
   md: 'base-input !pr-10',
   sm: 'rounded-md bg-gray-100 py-1.5 pl-3 pr-7 text-body-s font-bold',
 } as const;
diff --git a/src/components/ui/dropdown/dropdown.tsx b/src/components/ui/dropdown/dropdown.tsx
index f9345fb..4934f74 100644
--- a/src/components/ui/dropdown/dropdown.tsx
+++ b/src/components/ui/dropdown/dropdown.tsx
@@ -4,38 +4,40 @@ import useEscapeKey from '@/hooks/useEscapeKey';
 import useSafeRef from '@/hooks/useSafeRef';
 import useToggle from '@/hooks/useToggle';
 import { cn } from '@/lib/utils/cn';
-import { useState } from 'react';
 import { DROPDOWN_ICON_STYLE, DROPDOWN_ITEM_STYLE, DROPDOWN_STYLE } from './dropdown.styles';
 import useDropdown from './hooks/useDropdown';
 
 interface DropdownProps<T extends string> {
   name: string;
-  areaLabel: string;
+  ariaLabel: string;
+  selected: T | undefined; // Controlled value
   values: readonly T[];
   size?: 'md' | 'sm';
-  defaultValue?: T;
   placeholder?: string;
   className?: string;
+  onChange: (value: T) => void;
 }
 
-// EX : <Dropdown name="formName" areaLabel="접근성라벨" values={ADDRESS_CODE} />
+// EX : <Dropdown name="formName" ariaLabel="접근성라벨" values={ADDRESS_CODE} />
 const Dropdown = <T extends string>({
   name,
-  areaLabel: label,
+  ariaLabel,
   values,
   size = 'md',
-  defaultValue,
+  selected,
   placeholder = '선택해주세요',
   className,
+  onChange,
 }: DropdownProps<T>) => {
   const { value: isOpen, toggle, setClose } = useToggle();
-  const [selected, setSelected] = useState<T | undefined>(defaultValue);
   const [attachDropdownRef, dropdownRef] = useSafeRef<HTMLDivElement>();
   const [attachTriggerRef, triggerRef] = useSafeRef<HTMLButtonElement>();
   const [attachListRef, listRef] = useSafeRef<HTMLDivElement>();
-  const handleSelect = (value: T) => {
-    setSelected(value);
+
+  const handleSelect = (val: T) => {
+    onChange(val);
     setClose();
+    // triggerRef.current?.focus();
   };
 
   const { cursorIndex, position } = useDropdown({
@@ -57,7 +59,7 @@ const Dropdown = <T extends string>({
         ref={attachTriggerRef}
         type='button'
         aria-expanded={isOpen}
-        aria-label={label}
+        aria-label={ariaLabel}
         className={cn(
           DROPDOWN_STYLE['base'],
           size === 'md' ? DROPDOWN_STYLE['md'] : DROPDOWN_STYLE['sm']
@@ -68,7 +70,7 @@ const Dropdown = <T extends string>({
         <Icon
           iconName={isOpen ? 'dropdownUp' : 'dropdownDown'}
           iconSize={size === 'md' ? 'sm' : 'x-sm'}
-          ariaLabel='옵션선택'
+          decorative
           className={cn(
             DROPDOWN_ICON_STYLE['base'],
             size === 'md' ? DROPDOWN_ICON_STYLE['md'] : DROPDOWN_ICON_STYLE['sm']
@@ -81,7 +83,7 @@ const Dropdown = <T extends string>({
         <div
           ref={attachListRef}
           role='listbox'
-          aria-label={label}
+          aria-label={ariaLabel}
           className={cn(
             'scroll-bar absolute z-[1] max-h-56 w-full rounded-md border border-gray-300 bg-white shadow-inset-top',
             position === 'top' ? 'bottom-[calc(100%+8px)]' : 'top-[calc(100%+8px)]'
diff --git a/src/components/ui/dropdown/hooks/useDropdown.ts b/src/components/ui/dropdown/hooks/useDropdown.ts
index 76e161c..0dfbca3 100644
--- a/src/components/ui/dropdown/hooks/useDropdown.ts
+++ b/src/components/ui/dropdown/hooks/useDropdown.ts
@@ -19,14 +19,13 @@ const useDropdown = <T extends string>({
   onSelect,
 }: UseDropdownProps<T>) => {
   const position = useDropdownPosition(triggerRef);
-  const { cursorIndex, setCursorIndex } = useKeyboardNavigation({ isOpen, values, onSelect });
+  const { cursorIndex } = useKeyboardNavigation({ isOpen, values, onSelect });
 
   useDropdownScroll(listRef, cursorIndex);
 
   return {
     cursorIndex,
     position,
-    setCursorIndex,
   };
 };
 
diff --git a/src/components/ui/dropdown/hooks/useDropdownPosition.ts b/src/components/ui/dropdown/hooks/useDropdownPosition.ts
index 4ce818b..2b927a2 100644
--- a/src/components/ui/dropdown/hooks/useDropdownPosition.ts
+++ b/src/components/ui/dropdown/hooks/useDropdownPosition.ts
@@ -1,6 +1,6 @@
 import { RefObject, useEffect, useState } from 'react';
 
-const useDropdownPosition = (triggerRef: RefObject<HTMLButtonElement>) => {
+const useDropdownPosition = (triggerRef: RefObject<HTMLButtonElement>, threshold = 300) => {
   const [position, setPosition] = useState<'top' | 'bottom'>('bottom');
 
   useEffect(() => {
@@ -10,7 +10,7 @@ const useDropdownPosition = (triggerRef: RefObject<HTMLButtonElement>) => {
     const updatePosition = () => {
       const rect = trigger.getBoundingClientRect();
       const viewportHeight = window.innerHeight;
-      setPosition(viewportHeight - rect.bottom < 300 ? 'top' : 'bottom');
+      setPosition(viewportHeight - rect.bottom < threshold ? 'top' : 'bottom');
     };
 
     updatePosition();
@@ -20,7 +20,7 @@ const useDropdownPosition = (triggerRef: RefObject<HTMLButtonElement>) => {
       window.removeEventListener('resize', updatePosition);
       window.removeEventListener('scroll', updatePosition, true);
     };
-  }, [triggerRef]);
+  }, [triggerRef, threshold]);
 
   return position;
 };
diff --git a/src/components/ui/icon/icon.tsx b/src/components/ui/icon/icon.tsx
index a845e4e..4a2496b 100644
--- a/src/components/ui/icon/icon.tsx
+++ b/src/components/ui/icon/icon.tsx
@@ -13,7 +13,7 @@ interface IconProps extends React.HTMLAttributes<HTMLSpanElement> {
   iconSize?: IconSize; // 모바일 기본 사이즈
   bigScreenSize?: IconResponsiveSize; // PC에서 사이즈 다를때 사용
   className?: string;
-  ariaLabel: string; // 접근성 라벨
+  ariaLabel?: string; // 접근성 라벨
   decorative?: boolean;
 }