diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/alarm/AlarmController.kt b/src/main/kotlin/kr/co/vividnext/sodalive/alarm/AlarmController.kt
index 3a630f7..2428b4f 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/alarm/AlarmController.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/alarm/AlarmController.kt
@@ -5,6 +5,8 @@ import kr.co.vividnext.sodalive.common.SodaException
 import kr.co.vividnext.sodalive.member.Member
 import org.springframework.security.core.annotation.AuthenticationPrincipal
 import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.PathVariable
+import org.springframework.web.bind.annotation.PostMapping
 import org.springframework.web.bind.annotation.RequestMapping
 import org.springframework.web.bind.annotation.RestController
 
@@ -21,4 +23,19 @@ class AlarmController(private val service: AlarmService) {
             service.getSlotQuantityAndPrice(memberId = member.id!!)
         )
     }
+
+    @PostMapping("/buy-slot/{container}")
+    fun buyExtraSlot(
+        @PathVariable("container") container: String,
+        @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?
+    ) = run {
+        if (member == null) throw SodaException("로그인 정보를 확인해주세요.")
+
+        ApiResponse.ok(
+            service.buyExtraSlot(
+                memberId = member.id!!,
+                container = container
+            )
+        )
+    }
 }
diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/alarm/AlarmService.kt b/src/main/kotlin/kr/co/vividnext/sodalive/alarm/AlarmService.kt
index c8fe132..9881eed 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/alarm/AlarmService.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/alarm/AlarmService.kt
@@ -1,9 +1,16 @@
 package kr.co.vividnext.sodalive.alarm
 
+import kr.co.vividnext.sodalive.can.payment.CanPaymentService
+import kr.co.vividnext.sodalive.can.use.CanUsage
+import kr.co.vividnext.sodalive.common.SodaException
 import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
 
 @Service
-class AlarmService(private val repository: AlarmRepository) {
+class AlarmService(
+    private val canPaymentService: CanPaymentService,
+    private val repository: AlarmRepository
+) {
     fun getSlotQuantityAndPrice(memberId: Long): GetSlotQuantityAndPriceResponse {
         val slotQuantity = repository.getSlotQuantity(memberId)
 
@@ -28,4 +35,33 @@ class AlarmService(private val repository: AlarmRepository) {
             }
         )
     }
+
+    @Transactional
+    fun buyExtraSlot(memberId: Long, container: String) {
+        val slotQuantity = repository.getSlotQuantity(memberId)
+        val needCan = when (slotQuantity) {
+            0 -> {
+                30
+            }
+
+            1 -> {
+                60
+            }
+
+            2 -> {
+                100
+            }
+
+            else -> {
+                throw SodaException("이미 구매하셨습니다")
+            }
+        }
+
+        canPaymentService.spendCan(
+            memberId = memberId,
+            needCan = needCan,
+            canUsage = CanUsage.ALARM_SLOT,
+            container = container
+        )
+    }
 }
diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/can/payment/CanPaymentService.kt b/src/main/kotlin/kr/co/vividnext/sodalive/can/payment/CanPaymentService.kt
index e36e8c1..29da205 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/can/payment/CanPaymentService.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/can/payment/CanPaymentService.kt
@@ -96,6 +96,8 @@ class CanPaymentService(
             recipientId = communityPost.member!!.id!!
             useCan.communityPost = communityPost
             useCan.member = member
+        } else if (canUsage == CanUsage.ALARM_SLOT) {
+            useCan.member = member
         } else {
             throw SodaException("잘못된 요청입니다.")
         }