diff --git a/src/apis/getEmotion.ts b/src/apis/getEmotion.ts
new file mode 100644
index 00000000..044ff3c3
--- /dev/null
+++ b/src/apis/getEmotion.ts
@@ -0,0 +1,25 @@
+import { EmotionType } from '@/types/emotion';
+import type { GetEmotionResponseType } from '@/schema/emotion';
+import { translateEmotionToKorean } from '@/utils/emotionMap';
+import httpClient from '.';
+import { getMe } from './user';
+
+const getEmotion = async (): Promise<EmotionType | null> => {
+  const user = await getMe();
+  if (!user) {
+    throw new Error('로그인이 필요합니다.');
+  }
+
+  const response = await httpClient.get<GetEmotionResponseType>('/emotionLogs/today', {
+    params: { userId: user.id },
+  });
+
+  if (response.status === 204) {
+    return null; // No content
+  }
+
+  const koreanEmotion = translateEmotionToKorean(response.data.emotion);
+  return koreanEmotion;
+};
+
+export default getEmotion;
diff --git a/src/apis/postEmotion.ts b/src/apis/postEmotion.ts
new file mode 100644
index 00000000..98130bc7
--- /dev/null
+++ b/src/apis/postEmotion.ts
@@ -0,0 +1,24 @@
+import { EmotionType } from '@/types/emotion';
+import type { PostEmotionRequestType, PostEmotionResponseType } from '@/schema/emotion';
+import { translateEmotionToEnglish } from '@/utils/emotionMap';
+import httpClient from '.';
+import { getMe } from './user';
+
+const postEmotion = async (emotion: EmotionType): Promise<PostEmotionResponseType> => {
+  const user = await getMe();
+  if (!user) {
+    throw new Error('로그인이 필요합니다.');
+  }
+
+  const englishEmotion = translateEmotionToEnglish(emotion);
+  const request: PostEmotionRequestType = { emotion: englishEmotion };
+
+  const response = await httpClient.post<PostEmotionResponseType>('/emotionLogs/today', {
+    ...request,
+    userId: user.id,
+  });
+
+  return response.data;
+};
+
+export default postEmotion;
diff --git a/src/components/Emotion/EmotionCard.tsx b/src/components/Emotion/EmotionCard.tsx
index 1896f7cd..74134281 100644
--- a/src/components/Emotion/EmotionCard.tsx
+++ b/src/components/Emotion/EmotionCard.tsx
@@ -7,7 +7,7 @@
 import React from 'react';
 import cn from '@/lib/utils';
 import Image from 'next/image';
-import { EmotionIconCardProps } from '@/types/EmotionTypes';
+import { EmotionIconCardProps } from '@/types/emotion';
 
 // 아이콘 파일 경로 매핑
 const iconPaths = {
diff --git a/src/components/Emotion/EmotionSaveToast.tsx b/src/components/Emotion/EmotionSaveToast.tsx
new file mode 100644
index 00000000..e7d24105
--- /dev/null
+++ b/src/components/Emotion/EmotionSaveToast.tsx
@@ -0,0 +1,34 @@
+/*
+ * 오늘의 감정을 선택하면 표시되는 toast입니다.
+ * 감정을 확인하기 위해 마이페이지로 연결됩니다.
+ */
+
+import React, { useEffect } from 'react';
+import { useToast } from '@/components/ui/use-toast';
+import { ToastAction } from '@/components/ui/toast';
+import { useRouter } from 'next/router';
+
+interface EmotionSaveToastProps {
+  iconType: string;
+}
+
+function EmotionSaveToast({ iconType }: EmotionSaveToastProps) {
+  const { toast } = useToast();
+  const router = useRouter();
+
+  useEffect(() => {
+    toast({
+      title: '오늘의 감정이 저장되었습니다.',
+      description: `오늘의 감정: ${iconType}`,
+      action: (
+        <ToastAction altText='확인하기' onClick={() => router.push('/mypage')}>
+          확인하기
+        </ToastAction>
+      ),
+    });
+  }, [iconType, toast, router]);
+
+  return null;
+}
+
+export default EmotionSaveToast;
diff --git a/src/components/Emotion/EmotionSelector.tsx b/src/components/Emotion/EmotionSelector.tsx
index 5a73639e..fc92728b 100644
--- a/src/components/Emotion/EmotionSelector.tsx
+++ b/src/components/Emotion/EmotionSelector.tsx
@@ -1,19 +1,21 @@
-/*
-  여러 개의 EmotionIconCard를 관리합니다.
-  사용자 인터페이스에 필요한 상호 작용 로직을 포함합니다.
- */
-
-import React, { useState } from 'react';
-import EmotionIconCard from '@/components/Emotion/EmotionCard';
+import React, { useState, useEffect } from 'react';
 import useMediaQuery from '@/hooks/useMediaQuery';
-import { EmotionType, EmotionState } from '@/types/EmotionTypes';
+import EmotionIconCard from '@/components/Emotion/EmotionCard';
+import { EmotionType, EmotionState } from '@/types/emotion';
+import usePostEmotion from '@/hooks/usePostEmotion';
+import useGetEmotion from '@/hooks/useGetEmotion';
+import EmotionSaveToast from './EmotionSaveToast';
 
-// EmotionSelector 컴포넌트 함수 선언
+/**
+ * EmotionSelector 컴포넌트는 여러 개의 EmotionIconCard를 관리하고
+ * 사용자의 오늘의 감정을 선택하고 저장하고 출력합니다.
+ */
 function EmotionSelector() {
+  // 반응형 디자인을 위한 미디어 쿼리 훅
   const isTablet = useMediaQuery('(min-width: 768px) and (max-width: 1024px)');
   const isMobile = useMediaQuery('(max-width: 767px)');
 
-  // 감정 카드 상태 관리
+  // 감정 카드 상태 관리를 위한 useState 훅
   const [states, setStates] = useState<Record<EmotionType, EmotionState>>({
     감동: 'Default',
     기쁨: 'Default',
@@ -22,13 +24,37 @@ function EmotionSelector() {
     분노: 'Default',
   });
 
-  // 감정 카드 클릭 핸들러
-  const handleCardClick = (iconType: EmotionType) => {
+  // 현재 선택된 감정을 관리하는 useState 훅
+  const [selectedEmotion, setSelectedEmotion] = useState<EmotionType | null>(null);
+  // 오늘의 감정을 조회하기 위한 훅
+  const { data: emotion, error: getError, isLoading: isGetLoading } = useGetEmotion();
+  // 감정을 저장하기 위한 훅
+  const postEmotionMutation = usePostEmotion();
+
+  // 컴포넌트가 마운트될 때 한 번만 실행되는 useEffect 훅
+  // 오늘의 감정을 조회하고 상태를 업데이트합니다.
+  useEffect(() => {
+    if (emotion) {
+      setStates((prevStates) => ({
+        ...prevStates,
+        [emotion]: 'Clicked',
+      }));
+    }
+  }, [emotion]);
+
+  /**
+   * 감정 카드 클릭 핸들러
+   * 사용자가 감정 카드를 클릭했을 때 호출됩니다.
+   * 클릭된 감정 카드를 'Clicked' 상태로 설정하고 나머지 카드는 'Unclicked' 상태로 설정합니다.
+   * 감정을 서버에 저장합니다.
+   * @param iconType - 클릭된 감정의 타입
+   */
+  const handleCardClick = async (iconType: EmotionType) => {
     setStates((prevStates) => {
       const newStates = { ...prevStates };
 
       if (prevStates[iconType] === 'Clicked') {
-        // 현재 클릭된 카드가 다시 클릭되면 모두 Default로 설정
+        // 현재 클릭된 카드가 다시 클릭되면 모든 카드를 Default로 설정
         Object.keys(newStates).forEach((key) => {
           newStates[key as EmotionType] = 'Default';
         });
@@ -41,8 +67,20 @@ function EmotionSelector() {
 
       return newStates;
     });
+
+    // 오늘의 감정 저장
+    postEmotionMutation.mutate(iconType, {
+      onSuccess: (_, clickedIconType) => {
+        setSelectedEmotion(clickedIconType);
+      },
+      onError: (error: unknown) => {
+        // eslint-disable-next-line
+        console.error(error);
+      },
+    });
   };
 
+  // 반응형 디자인을 위한 카드 크기 설정
   let containerClass = 'w-[544px] h-[136px] gap-4';
   let cardSize: 'lg' | 'md' | 'sm' = 'lg';
 
@@ -54,12 +92,19 @@ function EmotionSelector() {
     cardSize = 'sm';
   }
 
+  if (isGetLoading) return <p>Loading...</p>;
+  if (getError) return <p>{getError.message}</p>;
+
   return (
-    <div className={`justify-start items-start inline-flex ${containerClass}`}>
-      {(['감동', '기쁨', '고민', '슬픔', '분노'] as const).map((iconType) => (
-        <EmotionIconCard key={iconType} iconType={iconType} size={cardSize} state={states[iconType]} onClick={() => handleCardClick(iconType)} />
-      ))}
-    </div>
+    <>
+      <div className={`justify-start items-start inline-flex ${containerClass}`}>
+        {(['감동', '기쁨', '고민', '슬픔', '분노'] as const).map((iconType) => (
+          <EmotionIconCard key={iconType} iconType={iconType} size={cardSize} state={states[iconType]} onClick={() => handleCardClick(iconType)} />
+        ))}
+      </div>
+      {/* 감정이 선택되었을 때 토스트 메시지 표시 */}
+      {selectedEmotion && <EmotionSaveToast iconType={selectedEmotion} />}
+    </>
   );
 }
 
diff --git a/src/hooks/useGetEmotion.ts b/src/hooks/useGetEmotion.ts
new file mode 100644
index 00000000..d8017abc
--- /dev/null
+++ b/src/hooks/useGetEmotion.ts
@@ -0,0 +1,11 @@
+import { useQuery } from '@tanstack/react-query';
+import getEmotion from '@/apis/getEmotion';
+import { EmotionType } from '@/types/emotion';
+
+const useGetEmotion = () =>
+  useQuery<EmotionType | null, Error>({
+    queryKey: ['emotion'],
+    queryFn: getEmotion,
+  });
+
+export default useGetEmotion;
diff --git a/src/hooks/usePostEmotion.ts b/src/hooks/usePostEmotion.ts
new file mode 100644
index 00000000..f13540ae
--- /dev/null
+++ b/src/hooks/usePostEmotion.ts
@@ -0,0 +1,11 @@
+import { useMutation } from '@tanstack/react-query';
+import postEmotion from '@/apis/postEmotion';
+import { EmotionType } from '@/types/emotion';
+import { PostEmotionResponseType } from '@/schema/emotion';
+
+const usePostEmotion = () =>
+  useMutation<PostEmotionResponseType, Error, EmotionType>({
+    mutationFn: postEmotion,
+  });
+
+export default usePostEmotion;
diff --git a/src/schema/emotion.ts b/src/schema/emotion.ts
new file mode 100644
index 00000000..a2239be9
--- /dev/null
+++ b/src/schema/emotion.ts
@@ -0,0 +1,23 @@
+import * as z from 'zod';
+
+export const PostEmotionRequest = z.object({
+  emotion: z.enum(['MOVED', 'JOY', 'WORRY', 'SADNESS', 'ANGER']),
+});
+
+export const PostEmotionResponse = z.object({
+  createdAt: z.coerce.date(),
+  emotion: z.enum(['MOVED', 'JOY', 'WORRY', 'SADNESS', 'ANGER']),
+  userId: z.number(),
+  id: z.number(),
+});
+
+export const GetEmotionResponse = z.object({
+  createdAt: z.coerce.date(),
+  emotion: z.enum(['MOVED', 'JOY', 'WORRY', 'SADNESS', 'ANGER']),
+  userId: z.number(),
+  id: z.number(),
+});
+
+export type PostEmotionRequestType = z.infer<typeof PostEmotionRequest>;
+export type PostEmotionResponseType = z.infer<typeof PostEmotionResponse>;
+export type GetEmotionResponseType = z.infer<typeof GetEmotionResponse>;
diff --git a/src/types/EmotionTypes.ts b/src/types/emotion.ts
similarity index 100%
rename from src/types/EmotionTypes.ts
rename to src/types/emotion.ts
diff --git a/src/utils/emotionMap.ts b/src/utils/emotionMap.ts
new file mode 100644
index 00000000..84b5663e
--- /dev/null
+++ b/src/utils/emotionMap.ts
@@ -0,0 +1,23 @@
+import { EmotionType } from '@/types/emotion';
+
+const emotionMap: Record<EmotionType, 'MOVED' | 'JOY' | 'WORRY' | 'SADNESS' | 'ANGER'> = {
+  감동: 'MOVED',
+  기쁨: 'JOY',
+  고민: 'WORRY',
+  슬픔: 'SADNESS',
+  분노: 'ANGER',
+};
+
+const reverseEmotionMap: Record<'MOVED' | 'JOY' | 'WORRY' | 'SADNESS' | 'ANGER', EmotionType> = {
+  MOVED: '감동',
+  JOY: '기쁨',
+  WORRY: '고민',
+  SADNESS: '슬픔',
+  ANGER: '분노',
+};
+
+const translateEmotionToEnglish = (emotion: EmotionType): 'MOVED' | 'JOY' | 'WORRY' | 'SADNESS' | 'ANGER' => emotionMap[emotion];
+
+const translateEmotionToKorean = (emotion: 'MOVED' | 'JOY' | 'WORRY' | 'SADNESS' | 'ANGER'): EmotionType => reverseEmotionMap[emotion];
+
+export { translateEmotionToEnglish, translateEmotionToKorean };