diff --git a/src/main/java/clap/server/adapter/inbound/web/statistics/FindStatisticsController.java b/src/main/java/clap/server/adapter/inbound/web/statistics/FindStatisticsController.java
index dfa2b023..de72d30b 100644
--- a/src/main/java/clap/server/adapter/inbound/web/statistics/FindStatisticsController.java
+++ b/src/main/java/clap/server/adapter/inbound/web/statistics/FindStatisticsController.java
@@ -32,12 +32,14 @@ public class FindStatisticsController {
 
 
     @Operation(summary = "기본 통계 API")
-    @Parameter(name = "periodType", description = "day, week, month", required = true, in = QUERY)
-    @Parameter(name = "statisticsType", description = "request-by-period, process-by-period, request-by-category, process-by-manager", required = true, in = QUERY)
+    @Parameter(name = "periodType", required = true, in = QUERY)
+    @Parameter(name = "statisticsType", required = true, in = QUERY)
     @GetMapping
     @Secured("ROLE_MANAGER")
     public ResponseEntity<List<StatisticsResponse>> aggregateTaskStatistics(@RequestParam PeriodType periodType, @RequestParam StatisticsType statisticsType) {
-        switch (statisticsType) {
+        System.out.println("periodType = " + periodType);
+        System.out.println("statisticsType = " + statisticsType);
+        return switch (statisticsType) {
             case REQUEST_BY_PERIOD ->
                     ResponseEntity.ok(findTaskProcessUsecase.aggregatePeriodTaskRequest(periodType.getType()));
             case PROCESS_BY_PERIOD -> ResponseEntity.ok(findTaskProcessUsecase
@@ -46,8 +48,8 @@ public ResponseEntity<List<StatisticsResponse>> aggregateTaskStatistics(@Request
                     ResponseEntity.ok(findTaskProcessUsecase.aggregateCategoryTaskRequest(periodType.getType()));
             case PROCESS_BY_MANAGER -> ResponseEntity.ok(findTaskProcessUsecase
                     .aggregateManagerTaskProcess(periodType.getType()));
-        }
-        throw new StatisticsException(STATISTICS_BAD_REQUEST);
+            default -> throw new StatisticsException(STATISTICS_BAD_REQUEST);
+        };
     }
 
     @Operation(summary = "1차 카테고리 하위 2차 카테고리별 통계 API")
diff --git a/src/main/java/clap/server/application/service/admin/AddCategoryService.java b/src/main/java/clap/server/application/service/admin/AddCategoryService.java
index cd401450..61f656ca 100644
--- a/src/main/java/clap/server/application/service/admin/AddCategoryService.java
+++ b/src/main/java/clap/server/application/service/admin/AddCategoryService.java
@@ -10,6 +10,7 @@
 import clap.server.domain.model.task.Category;
 import clap.server.exception.ApplicationException;
 import lombok.RequiredArgsConstructor;
+import org.springframework.transaction.annotation.Transactional;
 
 import java.util.Optional;
 
@@ -24,6 +25,7 @@ public class AddCategoryService implements AddMainCategoryUsecase, AddSubCategor
     private final LoadMemberPort loadMemberPort;
 
     @Override
+    @Transactional
     public void addMainCategory(Long adminId, String code, String name) {
         Optional<Member> activeMember = loadMemberPort.findActiveMemberById(adminId);
         Category mainCategory = Category.createMainCategory(
@@ -33,6 +35,7 @@ public void addMainCategory(Long adminId, String code, String name) {
     }
 
     @Override
+    @Transactional
     public void addSubCategory(Long adminId, Long mainCategoryId, String code, String name) {
         Optional<Member> activeMember = loadMemberPort.findActiveMemberById(adminId);
         Optional<Category> mainCategory = loadCategoryPort.findById(mainCategoryId);
diff --git a/src/main/java/clap/server/application/service/admin/DeleteCategoryService.java b/src/main/java/clap/server/application/service/admin/DeleteCategoryService.java
index f490bd5e..f4ad09a3 100644
--- a/src/main/java/clap/server/application/service/admin/DeleteCategoryService.java
+++ b/src/main/java/clap/server/application/service/admin/DeleteCategoryService.java
@@ -2,9 +2,11 @@
 
 import clap.server.application.port.inbound.admin.DeleteCategoryUsecase;
 import clap.server.application.port.inbound.domain.MemberService;
+import clap.server.application.port.outbound.task.CommandCategoryPort;
 import clap.server.application.port.outbound.task.LoadCategoryPort;
 import clap.server.common.annotation.architecture.ApplicationService;
 import clap.server.domain.model.member.Member;
+import clap.server.domain.model.task.Category;
 import clap.server.exception.ApplicationException;
 import lombok.RequiredArgsConstructor;
 import org.springframework.transaction.annotation.Transactional;
@@ -16,13 +18,15 @@
 public class DeleteCategoryService implements DeleteCategoryUsecase {
     private final LoadCategoryPort loadCategoryPort;
     private final MemberService memberService;
+    private final CommandCategoryPort commandCategoryPort;
 
     @Override
     @Transactional
     public void deleteCategory(Long adminId, Long categoryId) {
         Member admin = memberService.findActiveMember(adminId);
-        loadCategoryPort.findById(categoryId)
-                .orElseThrow(() -> new ApplicationException(CATEGORY_NOT_FOUND))
-                .deleteCategory(admin);
+        Category category = loadCategoryPort.findById(categoryId)
+                .orElseThrow(() -> new ApplicationException(CATEGORY_NOT_FOUND));
+        category.deleteCategory(admin);
+        commandCategoryPort.save(category);
     }
 }
diff --git a/src/main/java/clap/server/common/utils/StringToPeriodTypeConverter.java b/src/main/java/clap/server/common/utils/StringToPeriodTypeConverter.java
deleted file mode 100644
index ae462adf..00000000
--- a/src/main/java/clap/server/common/utils/StringToPeriodTypeConverter.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package clap.server.common.utils;
-
-import clap.server.adapter.inbound.web.dto.statistics.PeriodType;
-import org.springframework.core.convert.converter.Converter;
-import org.springframework.stereotype.Component;
-
-@Component
-public class StringToPeriodTypeConverter implements Converter<String, PeriodType> {
-    @Override
-    public PeriodType convert(String source) {
-        return PeriodType.from(source);
-    }
-}
diff --git a/src/main/java/clap/server/common/utils/StringToStatisticsTypeConverter.java b/src/main/java/clap/server/common/utils/StringToStatisticsTypeConverter.java
deleted file mode 100644
index 6828d711..00000000
--- a/src/main/java/clap/server/common/utils/StringToStatisticsTypeConverter.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package clap.server.common.utils;
-
-import clap.server.adapter.inbound.web.dto.statistics.StatisticsType;
-import org.springframework.core.convert.converter.Converter;
-import org.springframework.stereotype.Component;
-
-@Component
-public class StringToStatisticsTypeConverter implements Converter<String, StatisticsType> {
-    @Override
-    public StatisticsType convert(String source) {
-        return StatisticsType.from(source);
-    }
-}
diff --git a/src/main/java/clap/server/config/web/WebConfig.java b/src/main/java/clap/server/config/web/WebConfig.java
deleted file mode 100644
index 07947005..00000000
--- a/src/main/java/clap/server/config/web/WebConfig.java
+++ /dev/null
@@ -1,18 +0,0 @@
-package clap.server.config.web;
-
-import clap.server.common.utils.StringToPeriodTypeConverter;
-import clap.server.common.utils.StringToStatisticsTypeConverter;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.format.FormatterRegistry;
-import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
-
-
-@Configuration
-public class WebConfig implements WebMvcConfigurer {
-
-    @Override
-    public void addFormatters(FormatterRegistry registry) {
-        registry.addConverter(new StringToStatisticsTypeConverter());
-        registry.addConverter(new StringToPeriodTypeConverter());
-    }
-}