diff --git a/src/main/java/com/moabam/api/application/coupon/CouponManageService.java b/src/main/java/com/moabam/api/application/coupon/CouponManageService.java
index 67e3bac7..3cda6f9a 100644
--- a/src/main/java/com/moabam/api/application/coupon/CouponManageService.java
+++ b/src/main/java/com/moabam/api/application/coupon/CouponManageService.java
@@ -16,6 +16,7 @@
 import com.moabam.global.common.util.ClockHolder;
 import com.moabam.global.error.exception.BadRequestException;
 import com.moabam.global.error.exception.ConflictException;
+import com.moabam.global.error.exception.NotFoundException;
 import com.moabam.global.error.model.ErrorMessage;
 
 import lombok.RequiredArgsConstructor;
@@ -75,7 +76,7 @@ public void registerQueue(String couponName, Long memberId) {
 		couponManageRepository.addIfAbsentQueue(couponName, memberId, registerTime);
 	}
 
-	public void deleteQueue(String couponName) {
+	public void delete(String couponName) {
 		couponManageRepository.deleteQueue(couponName);
 		couponManageRepository.deleteCount(couponName);
 	}
@@ -83,7 +84,7 @@ public void deleteQueue(String couponName) {
 	private void validateRegisterQueue(String couponName, Long memberId) {
 		LocalDate now = clockHolder.date();
 		Coupon coupon = couponRepository.findByNameAndStartAt(couponName, now)
-			.orElseThrow(() -> new BadRequestException(ErrorMessage.INVALID_COUPON_PERIOD));
+			.orElseThrow(() -> new NotFoundException(ErrorMessage.INVALID_COUPON_PERIOD));
 
 		if (couponManageRepository.hasValue(couponName, memberId)) {
 			throw new ConflictException(ErrorMessage.CONFLICT_COUPON_ISSUE);
diff --git a/src/main/java/com/moabam/api/application/coupon/CouponService.java b/src/main/java/com/moabam/api/application/coupon/CouponService.java
index 43b289fb..3a765dff 100644
--- a/src/main/java/com/moabam/api/application/coupon/CouponService.java
+++ b/src/main/java/com/moabam/api/application/coupon/CouponService.java
@@ -60,7 +60,7 @@ public void delete(Long couponId, Role role) {
 			.orElseThrow(() -> new NotFoundException(ErrorMessage.NOT_FOUND_COUPON));
 
 		couponRepository.delete(coupon);
-		couponManageService.deleteQueue(coupon.getName());
+		couponManageService.delete(coupon.getName());
 	}
 
 	@Transactional
diff --git a/src/main/java/com/moabam/api/domain/coupon/repository/CouponManageRepository.java b/src/main/java/com/moabam/api/domain/coupon/repository/CouponManageRepository.java
index 44e2c150..0381f236 100644
--- a/src/main/java/com/moabam/api/domain/coupon/repository/CouponManageRepository.java
+++ b/src/main/java/com/moabam/api/domain/coupon/repository/CouponManageRepository.java
@@ -58,7 +58,13 @@ public int rankQueue(String couponName, Long memberId) {
 
 	public int getCount(String couponName) {
 		String couponCountKey = String.format(COUPON_COUNT_KEY, requireNonNull(couponName));
-		return Integer.parseInt(valueRedisRepository.get(couponCountKey));
+		String count = valueRedisRepository.get(couponCountKey);
+
+		if (isNull(count)) {
+			return 0;
+		}
+
+		return Integer.parseInt(count);
 	}
 
 	public void increase(String couponName, long count) {
diff --git a/src/main/resources/static/docs/coupon.html b/src/main/resources/static/docs/coupon.html
index d7435ce2..af8593f3 100644
--- a/src/main/resources/static/docs/coupon.html
+++ b/src/main/resources/static/docs/coupon.html
@@ -498,7 +498,7 @@ <h3 id="_쿠폰_삭제">쿠폰 삭제</h3>
 <h4 id="_요청_2" class="discrete">요청</h4>
 <div class="listingblock">
 <div class="content">
-<pre class="highlight nowrap"><code class="language-http" data-lang="http">DELETE /admins/coupons/33 HTTP/1.1
+<pre class="highlight nowrap"><code class="language-http" data-lang="http">DELETE /admins/coupons/36 HTTP/1.1
 Host: localhost:8080</code></pre>
 </div>
 </div>
@@ -526,7 +526,7 @@ <h3 id="_특정_쿠폰_조회">특정 쿠폰 조회</h3>
 <h4 id="_요청_3">요청</h4>
 <div class="listingblock">
 <div class="content">
-<pre class="highlight nowrap"><code class="language-http" data-lang="http">GET /coupons/21 HTTP/1.1
+<pre class="highlight nowrap"><code class="language-http" data-lang="http">GET /coupons/24 HTTP/1.1
 Host: localhost:8080</code></pre>
 </div>
 </div>
@@ -543,7 +543,7 @@ <h4 id="_응답_3" class="discrete">응답</h4>
 Content-Length: 201
 
 {
-  "id" : 21,
+  "id" : 24,
   "adminName" : "ID : 1",
   "name" : "couponName",
   "description" : "",
@@ -593,7 +593,7 @@ <h4 id="_응답_4" class="discrete">응답</h4>
 Content-Length: 202
 
 [ {
-  "id" : 22,
+  "id" : 25,
   "adminName" : "ID : 1",
   "name" : "coupon1",
   "description" : "",
@@ -630,17 +630,17 @@ <h4 id="_요청_5">요청</h4>
 <h4 id="_응답_5" class="discrete">응답</h4>
 <div class="listingblock">
 <div class="content">
-<pre class="highlight nowrap"><code class="language-http" data-lang="http">HTTP/1.1 400 Bad Request
+<pre class="highlight nowrap"><code class="language-http" data-lang="http">HTTP/1.1 409 Conflict
 Access-Control-Allow-Origin:
 Access-Control-Allow-Methods: GET, HEAD, POST, PUT, DELETE, TRACE, OPTIONS, PATCH
 Access-Control-Allow-Headers: Origin, Accept, Access-Control-Request-Method, Access-Control-Request-Headers, X-Requested-With,Content-Type, Referer
 Access-Control-Allow-Credentials: true
 Access-Control-Max-Age: 3600
 Content-Type: application/json
-Content-Length: 64
+Content-Length: 63
 
 {
-  "message" : "쿠폰 발급 가능 기간이 아닙니다."
+  "message" : "이미 쿠폰 발급에 성공했습니다!"
 }</code></pre>
 </div>
 </div>
diff --git a/src/test/java/com/moabam/api/application/coupon/CouponManageServiceTest.java b/src/test/java/com/moabam/api/application/coupon/CouponManageServiceTest.java
index baa32d07..d209cdfe 100644
--- a/src/test/java/com/moabam/api/application/coupon/CouponManageServiceTest.java
+++ b/src/test/java/com/moabam/api/application/coupon/CouponManageServiceTest.java
@@ -24,7 +24,7 @@
 import com.moabam.api.domain.coupon.repository.CouponRepository;
 import com.moabam.api.domain.coupon.repository.CouponWalletRepository;
 import com.moabam.global.common.util.ClockHolder;
-import com.moabam.global.error.exception.BadRequestException;
+import com.moabam.global.error.exception.NotFoundException;
 import com.moabam.global.error.model.ErrorMessage;
 import com.moabam.support.common.FilterProcessExtension;
 import com.moabam.support.fixture.CouponFixture;
@@ -140,7 +140,7 @@ void registerQueue_No_BadRequestException() {
 
 		// When & Then
 		assertThatThrownBy(() -> couponManageService.registerQueue("couponName", 1L))
-			.isInstanceOf(BadRequestException.class)
+			.isInstanceOf(NotFoundException.class)
 			.hasMessage(ErrorMessage.INVALID_COUPON_PERIOD.getMessage());
 	}
 
@@ -151,7 +151,7 @@ void deleteQueue_success() {
 		String couponName = "couponName";
 
 		// When
-		couponManageService.deleteQueue(couponName);
+		couponManageService.delete(couponName);
 
 		// Then
 		verify(couponManageRepository).deleteQueue(couponName);
@@ -166,7 +166,7 @@ void deleteQueue_NullPointerException() {
 			.deleteQueue(any(String.class));
 
 		// When & Then
-		assertThatThrownBy(() -> couponManageService.deleteQueue("null"))
+		assertThatThrownBy(() -> couponManageService.delete("null"))
 			.isInstanceOf(NullPointerException.class);
 	}
 }
diff --git a/src/test/java/com/moabam/api/application/coupon/CouponServiceTest.java b/src/test/java/com/moabam/api/application/coupon/CouponServiceTest.java
index a8f37413..b44d6f8c 100644
--- a/src/test/java/com/moabam/api/application/coupon/CouponServiceTest.java
+++ b/src/test/java/com/moabam/api/application/coupon/CouponServiceTest.java
@@ -183,7 +183,7 @@ void delete_success() {
 
 		// Then
 		verify(couponRepository).delete(coupon);
-		verify(couponManageService).deleteQueue(any(String.class));
+		verify(couponManageService).delete(any(String.class));
 	}
 
 	@DisplayName("권한 없는 사용자가 쿠폰을 삭제한다. - NotFoundException")
diff --git a/src/test/java/com/moabam/api/presentation/CouponControllerTest.java b/src/test/java/com/moabam/api/presentation/CouponControllerTest.java
index fd968940..65f25723 100644
--- a/src/test/java/com/moabam/api/presentation/CouponControllerTest.java
+++ b/src/test/java/com/moabam/api/presentation/CouponControllerTest.java
@@ -35,6 +35,7 @@
 import com.moabam.api.domain.member.repository.MemberRepository;
 import com.moabam.api.dto.coupon.CouponStatusRequest;
 import com.moabam.api.dto.coupon.CreateCouponRequest;
+import com.moabam.api.infrastructure.redis.ValueRedisRepository;
 import com.moabam.api.infrastructure.redis.ZSetRedisRepository;
 import com.moabam.global.common.util.ClockHolder;
 import com.moabam.global.error.model.ErrorMessage;
@@ -73,6 +74,9 @@ class CouponControllerTest extends WithoutFilterSupporter {
 	@MockBean
 	ZSetRedisRepository zSetRedisRepository;
 
+	@MockBean
+	ValueRedisRepository valueRedisRepository;
+
 	@WithMember(role = Role.ADMIN)
 	@DisplayName("POST - 쿠폰을 성공적으로 발행한다. - Void")
 	@Test
@@ -420,9 +424,31 @@ void use_BadRequestException() throws Exception {
 	}
 
 	@WithMember
-	@DisplayName("POST - 발급 가능 날짜가 아닌 쿠폰에 발급 요청을 한다. (Not found) - BadRequestException")
+	@DisplayName("POST - 쿠폰 발급을 성공적으로 한다. - Void")
 	@Test
-	void registerQueue_Zero_StartAt_BadRequestException() throws Exception {
+	void registerQueue_success() throws Exception {
+		// Given
+		Coupon couponFixture = CouponFixture.coupon("CouponName", 2, 1);
+		Coupon coupon = couponRepository.save(couponFixture);
+
+		given(clockHolder.date()).willReturn(LocalDate.of(2023, 2, 1));
+		given(zSetRedisRepository.score(anyString(), anyLong())).willReturn(null);
+		given(zSetRedisRepository.size(anyString())).willReturn((long)(coupon.getMaxCount() - 1));
+
+		// When & Then
+		mockMvc.perform(post("/coupons")
+				.param("couponName", coupon.getName()))
+			.andDo(print())
+			.andDo(document("coupons",
+				preprocessRequest(prettyPrint()),
+				preprocessResponse(prettyPrint())))
+			.andExpect(status().isOk());
+	}
+
+	@WithMember
+	@DisplayName("POST - 발급 가능 날짜가 아닌 쿠폰에 발급 요청을 한다. - NotFoundException")
+	@Test
+	void registerQueue_NotFoundException() throws Exception {
 		// Given
 		Coupon couponFixture = CouponFixture.coupon();
 		Coupon coupon = couponRepository.save(couponFixture);
@@ -437,39 +463,45 @@ void registerQueue_Zero_StartAt_BadRequestException() throws Exception {
 				preprocessRequest(prettyPrint()),
 				preprocessResponse(prettyPrint()),
 				ErrorSnippet.ERROR_MESSAGE_RESPONSE))
-			.andExpect(status().isBadRequest())
+			.andExpect(status().isNotFound())
 			.andExpect(content().contentType(MediaType.APPLICATION_JSON))
 			.andExpect(jsonPath("$.message").value(ErrorMessage.INVALID_COUPON_PERIOD.getMessage()));
 	}
 
 	@WithMember
-	@DisplayName("POST - 발급 가능 날짜가 아닌 쿠폰에 발급 요청을 한다. (Not equals) - BadRequestException")
+	@DisplayName("POST - 동일한 쿠폰 이벤트에 중복으로 요청한다. - ConflictException")
 	@Test
-	void registerQueue_Not_StartAt_BadRequestException() throws Exception {
+	void registerQueue_ConflictException() throws Exception {
 		// Given
-		given(clockHolder.date()).willReturn(LocalDate.of(2022, 2, 1));
+		Coupon coupon = couponRepository.save(CouponFixture.coupon());
+
+		given(clockHolder.date()).willReturn(LocalDate.of(2023, 2, 1));
+		given(zSetRedisRepository.score(anyString(), anyLong())).willReturn(7.0);
 
 		// When & Then
 		mockMvc.perform(post("/coupons")
-				.param("couponName", "not start couponName"))
+				.param("couponName", coupon.getName()))
 			.andDo(print())
 			.andDo(document("coupons",
 				preprocessRequest(prettyPrint()),
 				preprocessResponse(prettyPrint()),
 				ErrorSnippet.ERROR_MESSAGE_RESPONSE))
-			.andExpect(status().isBadRequest())
+			.andExpect(status().isConflict())
 			.andExpect(content().contentType(MediaType.APPLICATION_JSON))
-			.andExpect(jsonPath("$.message").value(ErrorMessage.INVALID_COUPON_PERIOD.getMessage()));
+			.andExpect(jsonPath("$.message").value(ErrorMessage.CONFLICT_COUPON_ISSUE.getMessage()));
 	}
 
 	@WithMember
-	@DisplayName("POST - 존재하지 않는 쿠폰에 발급 요청을 한다. - NotFoundException")
+	@DisplayName("POST - 선착순 이벤트가 마감된 쿠폰에 발급 요청을 한다. - BadRequestException")
 	@Test
-	void registerQueue_NotFoundException() throws Exception {
+	void registerQueue_BadRequestException() throws Exception {
 		// Given
-		Coupon coupon = CouponFixture.coupon("Not found couponName", 2, 1);
+		Coupon couponFixture = CouponFixture.coupon();
+		Coupon coupon = couponRepository.save(couponFixture);
 
 		given(clockHolder.date()).willReturn(LocalDate.of(2023, 2, 1));
+		given(zSetRedisRepository.score(anyString(), anyLong())).willReturn(null);
+		given(zSetRedisRepository.size(anyString())).willReturn((long)(coupon.getMaxCount()));
 
 		// When & Then
 		mockMvc.perform(post("/coupons")
@@ -481,6 +513,6 @@ void registerQueue_NotFoundException() throws Exception {
 				ErrorSnippet.ERROR_MESSAGE_RESPONSE))
 			.andExpect(status().isBadRequest())
 			.andExpect(content().contentType(MediaType.APPLICATION_JSON))
-			.andExpect(jsonPath("$.message").value(ErrorMessage.INVALID_COUPON_PERIOD.getMessage()));
+			.andExpect(jsonPath("$.message").value(ErrorMessage.INVALID_COUPON_STOCK_END.getMessage()));
 	}
 }