diff --git a/src/app/timer/TimerView.tsx b/src/app/timer/TimerView.tsx
index 9d5488a3..e7ce822d 100644
--- a/src/app/timer/TimerView.tsx
+++ b/src/app/timer/TimerView.tsx
@@ -4,7 +4,7 @@ import { center } from '@/styled-system/patterns';
 
 interface Props {
   isActive: boolean;
-  time: [number, number];
+  time: [string, string];
   category: string;
 }
 export default function TimerView({ category, time, isActive }: Props) {
@@ -12,7 +12,11 @@ export default function TimerView({ category, time, isActive }: Props) {
     <div className={center()}>
       <div className={center(innerCss)}>
         <div className={css(categoryCss)}>{category}</div>
-        <div className={css(timerTextCss)}>
+        <div
+          className={css(timerTextCss, {
+            color: isActive ? 'transparent' : '#B0B8C1',
+          })}
+        >
           <span>{time[0]}</span>
           <span>:</span>
           <span>{time[1]}</span>
@@ -39,6 +43,5 @@ const timerTextCss = {
   animation: 'gradient 3s ease-in-out infinite',
   backgroundSize: '150% 200%!',
   '-webkit-background-clip': 'text!',
-  color: 'transparent',
   background: 'linear-gradient(108deg, #FF8C8C -1.04%, #5D8AFF 101.48%)',
 };
diff --git a/src/app/timer/layout.tsx b/src/app/timer/layout.tsx
index c69b896a..3aadb9f1 100644
--- a/src/app/timer/layout.tsx
+++ b/src/app/timer/layout.tsx
@@ -1,21 +1,10 @@
 import { type PropsWithChildren } from 'react';
-import Header from '@/components/Layout/Header';
 import { css } from '@/styled-system/css';
 
 export default function Layout({ children }: PropsWithChildren) {
-  return (
-    <div className={containerCss}>
-      <Header title={'미션 타이머'} />
-      <main className={mainCss}>{children}</main>
-    </div>
-  );
+  return <div className={containerCss}>{children}</div>;
 }
 
 const containerCss = css({
-  background: 'linear-gradient(136deg, #FFF1F2 4.76%, #E9EFFF 89.58%)',
   minHeight: '100vh',
 });
-
-const mainCss = css({
-  padding: '24px 16px',
-});
diff --git a/src/app/timer/page.tsx b/src/app/timer/page.tsx
index 5d2bc498..cd14a574 100644
--- a/src/app/timer/page.tsx
+++ b/src/app/timer/page.tsx
@@ -1,28 +1,72 @@
 'use client';
 import TimerView from '@/app/timer/TimerView';
-import useStep from '@/app/timer/useStep';
+import useTimer from '@/app/timer/useTimer';
+import useTimerStatus from '@/app/timer/useTimerStatus';
+import Header from '@/components/Layout/Header';
 import { css } from '@styled-system/css';
 
-const STEP_LABEL = {
-  ready: {
-    title: '준비 되셨나요?',
-    desc: '타이머를 눌러서 10분의 미션을 완성해 주세요!',
-  },
-} as const;
-
 export default function TimerPage() {
-  const { step } = useStep();
+  const { step, stepLabel, onNextStep } = useTimerStatus();
+  const { formattedTime } = useTimer(step);
+
+  const onFinish = () => {
+    onNextStep('stop');
+    alert('정말 끝내시겠습니까?');
+  };
 
   return (
-    <div>
-      <h1 className={titleCss}>{STEP_LABEL[step].title}</h1>
-      <p className={descCss}>{STEP_LABEL[step].desc}</p>
+    <div
+      className={css(bgCss, {
+        background: step === 'stop' ? '#F2F4F6' : 'linear-gradient(136deg, #FFF1F2 4.76%, #E9EFFF 89.58%)',
+      })}
+    >
+      <Header title={'미션 타이머'} />
+      <div className={css(containerCss)}>
+        <h1 className={titleCss}>{stepLabel.title}</h1>
+        <p className={descCss}>{stepLabel.desc}</p>
 
-      <TimerView category="카테고리" time={[10, 0]} isActive={true} />
+        <TimerView category="카테고리" time={formattedTime} isActive={step !== 'stop'} />
+        <div className={css(buttonContainerCss)}>
+          {step === 'ready' && (
+            <button type="button" onClick={() => onNextStep('progress')}>
+              시작
+            </button>
+          )}
+          {step === 'progress' && (
+            <>
+              <button type="button" onClick={() => onNextStep('stop')}>
+                일시정지
+              </button>
+              <button type="button" onClick={onFinish}>
+                끝내기
+              </button>
+            </>
+          )}
+          {step === 'stop' && (
+            <>
+              <button type="button" onClick={() => onNextStep('progress')}>
+                다시 시작
+              </button>
+              <button type="button" onClick={onFinish}>
+                끝내기
+              </button>
+            </>
+          )}
+        </div>
+      </div>
     </div>
   );
 }
 
+const bgCss = {
+  minHeight: '100vh',
+  transition: '1s ease',
+};
+
+const containerCss = {
+  padding: '24px 16px',
+};
+
 const font24Css = {
   fontSize: '24px',
   fontFamily: 'Pretendard',
@@ -40,3 +84,17 @@ const font14Css = {
 
 const titleCss = css(font24Css, { color: '#333D4B' });
 const descCss = css(font14Css, { color: '#6B7684', marginBottom: '84px' });
+
+const buttonContainerCss = {
+  margin: '28px auto',
+  display: 'flex',
+  justifyContent: 'center',
+  gap: '12px',
+
+  '& button': {
+    backgroundColor: 'white',
+    borderRadius: '30px',
+    padding: '16px 24px',
+    boxSizing: '0px 4px 20px 0px rgba(18, 23, 41, 0.10)',
+  },
+};
diff --git a/src/app/timer/useStep.ts b/src/app/timer/useStep.ts
deleted file mode 100644
index fa73394d..00000000
--- a/src/app/timer/useStep.ts
+++ /dev/null
@@ -1,12 +0,0 @@
-import { useState } from 'react';
-
-type StepType = 'ready';
-
-function useStep() {
-  const [step, setStep] = useState<StepType>('ready');
-
-  const onNextStep = () => {};
-  return { step, onNextStep };
-}
-
-export default useStep;
diff --git a/src/app/timer/useTimer.ts b/src/app/timer/useTimer.ts
new file mode 100644
index 00000000..31018aa2
--- /dev/null
+++ b/src/app/timer/useTimer.ts
@@ -0,0 +1,34 @@
+import { useEffect, useState } from 'react';
+import { type StepType } from '@/app/timer/useTimerStatus';
+
+export default function useTimer(status: StepType, initSeconds = 600) {
+  const [second, setSecond] = useState(initSeconds); // 남은 시간 (단위: 초)
+
+  const formattedTime = formatMMSS(second);
+
+  useEffect(() => {
+    let timer: NodeJS.Timeout;
+
+    if (second <= 0) {
+      return;
+    }
+
+    if (status === 'progress') {
+      timer = setInterval(() => {
+        setSecond((prev) => prev - 1);
+      }, 1000);
+    }
+    return () => clearInterval(timer);
+  }, [second, status]);
+
+  return { formattedTime };
+}
+
+const formatMMSS = (second: number): [string, string] => {
+  const minutes = Math.floor(second / 60); // 분 계산
+  const seconds = second % 60; // 초 계산
+  const formattedMinutes = String(minutes).padStart(2, '0'); // 두 자리로 변환
+  const formattedSeconds = String(seconds).padStart(2, '0'); // 두 자리로 변환
+
+  return [formattedMinutes, formattedSeconds];
+};
diff --git a/src/app/timer/useTimerStatus.ts b/src/app/timer/useTimerStatus.ts
new file mode 100644
index 00000000..73dc7964
--- /dev/null
+++ b/src/app/timer/useTimerStatus.ts
@@ -0,0 +1,32 @@
+import { useState } from 'react';
+
+export type StepType = 'ready' | 'progress' | 'stop';
+
+const TIMER_STATUS = {
+  ready: {
+    title: '준비 되셨나요?',
+    desc: '타이머를 눌러서 10분의 미션을 완성해 주세요!',
+  },
+  progress: {
+    title: '시작!',
+    desc: '10분 동안 최선을 다해주세요!',
+  },
+  stop: {
+    title: '잠시 멈췄어요',
+    desc: '준비가 되면 타이머를 다시 시작해주세요!',
+  },
+} as const;
+
+function useTimerStatus() {
+  const [step, setStep] = useState<StepType>('ready');
+
+  const stepLabel = TIMER_STATUS[step];
+
+  const onNextStep = (nextStep: StepType) => {
+    setStep(nextStep);
+  };
+
+  return { step, onNextStep, stepLabel };
+}
+
+export default useTimerStatus;
diff --git a/src/components/Layout/Header.tsx b/src/components/Layout/Header.tsx
index 28dda3dd..2afc2c6c 100644
--- a/src/components/Layout/Header.tsx
+++ b/src/components/Layout/Header.tsx
@@ -8,18 +8,30 @@ interface Props {
 
 function Header({ title }: Props) {
   return (
-    <div className={wrapperCss}>
-      <button type="button">
-        <Image src="/assets/icons/left-arrow-icon.svg" alt="Left Arrow Icon" width={20} height={20} />
-      </button>
-      <h2 className={headingCss}>{title}</h2>
-    </div>
+    <>
+      <header className={wrapperCss}>
+        <button type="button">
+          <Image src="/assets/icons/left-arrow-icon.svg" alt="Left Arrow Icon" width={20} height={20} />
+        </button>
+        <h2 className={headingCss}>{title}</h2>
+      </header>
+      <div className={css(headerBlankCss)} />
+    </>
   );
 }
 
+const headerBlankCss = {
+  height: '42px;',
+  width: '100%',
+};
+
 const wrapperCss = flex({
   padding: '10px 16px',
   gap: '6px',
+  background: 'transparent',
+  position: 'fixed',
+  margin: '0 auto',
+  zIndex: 100,
 });
 
 const headingCss = css({