diff --git a/src/main/kotlin/roomescape/theme/business/ThemeService.kt b/src/main/kotlin/roomescape/theme/business/ThemeService.kt
index 89492250..7ee4fb80 100644
--- a/src/main/kotlin/roomescape/theme/business/ThemeService.kt
+++ b/src/main/kotlin/roomescape/theme/business/ThemeService.kt
@@ -8,6 +8,7 @@ import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
 import roomescape.admin.business.AdminService
 import roomescape.common.config.next
+import roomescape.common.dto.AuditInfo
 import roomescape.theme.exception.ThemeErrorCode
 import roomescape.theme.exception.ThemeException
 import roomescape.theme.infrastructure.persistence.ThemeEntity
@@ -42,18 +43,9 @@ class ThemeService(
     }
 
     @Transactional(readOnly = true)
-    fun findThemesByIds(request: ThemeIdListRequest): ThemeInfoListResponse {
+    fun findAllInfosByIds(request: ThemeIdListRequest): ThemeInfoListResponse {
         log.info { "[ThemeService.findThemesByIds] 예약 페이지에서의 테마 목록 조회 시작: themeIds=${request.themeIds}" }
-        val result: MutableList<ThemeEntity> = mutableListOf()
-
-        for (id in request.themeIds) {
-            val theme: ThemeEntity? = themeRepository.findByIdOrNull(id)
-            if (theme == null) {
-                log.warn { "[ThemeService.findThemesByIds] id=${id} 인 테마 조회 실패" }
-                continue
-            }
-            result.add(theme)
-        }
+        val result: List<ThemeEntity> = themeRepository.findAllByIdIn(request.themeIds)
 
         return result.toInfoListResponse().also {
             log.info { "[ThemeService.findThemesByIds] ${it.themes.size} / ${request.themeIds.size} 개 테마 조회 완료" }
@@ -80,8 +72,9 @@ class ThemeService(
 
         val createdBy = adminService.findOperatorOrUnknown(theme.createdBy)
         val updatedBy = adminService.findOperatorOrUnknown(theme.updatedBy)
+        val audit = AuditInfo(theme.createdAt, createdBy, theme.updatedAt, updatedBy)
 
-        return theme.toAdminThemeDetailResponse(createdBy, updatedBy)
+        return theme.toAdminThemeDetailResponse(audit)
             .also { log.info { "[ThemeService.findAdminThemeDetail] 테마 상세 조회 완료: id=$id, name=${theme.name}" } }
     }
 
@@ -91,9 +84,8 @@ class ThemeService(
 
         themeValidator.validateCanCreate(request)
 
-        val theme: ThemeEntity = themeRepository.save(
-            request.toEntity(tsidFactory.next())
-        )
+        val theme: ThemeEntity = request.toEntity(id = tsidFactory.next())
+            .also { themeRepository.save(it) }
 
         return ThemeCreateResponse(theme.id).also {
             log.info { "[ThemeService.createTheme] 테마 생성 완료: id=${theme.id}, name=${theme.name}" }
@@ -155,7 +147,6 @@ class ThemeService(
             }
     }
 
-
     // ========================================
     // Common (공통 메서드)
     // ========================================
diff --git a/src/main/kotlin/roomescape/theme/infrastructure/persistence/ThemeRepository.kt b/src/main/kotlin/roomescape/theme/infrastructure/persistence/ThemeRepository.kt
index 8e55104b..25934626 100644
--- a/src/main/kotlin/roomescape/theme/infrastructure/persistence/ThemeRepository.kt
+++ b/src/main/kotlin/roomescape/theme/infrastructure/persistence/ThemeRepository.kt
@@ -9,4 +9,6 @@ interface ThemeRepository : JpaRepository<ThemeEntity, Long> {
     fun findActiveThemes(): List<ThemeEntity>
 
     fun existsByName(name: String): Boolean
-}
\ No newline at end of file
+
+    fun findAllByIdIn(themeIds: List<Long>): List<ThemeEntity>
+}