diff --git a/SPMS.API/Controllers/ServiceController.cs b/SPMS.API/Controllers/ServiceController.cs
index 71202fa..7c94cb4 100644
--- a/SPMS.API/Controllers/ServiceController.cs
+++ b/SPMS.API/Controllers/ServiceController.cs
@@ -41,6 +41,22 @@ public class ServiceController : ControllerBase
         return Ok(ApiResponse<CreateServiceResponseDto>.Success(result));
     }
 
+    [HttpPost("update")]
+    [SwaggerOperation(
+        Summary = "서비스 수정",
+        Description = "기존 서비스의 정보를 수정합니다. 서비스명, 설명, 웹훅 URL, 태그를 변경할 수 있습니다.")]
+    [SwaggerResponse(200, "수정 성공", typeof(ApiResponse<ServiceResponseDto>))]
+    [SwaggerResponse(400, "변경된 내용 없음")]
+    [SwaggerResponse(401, "인증되지 않은 요청")]
+    [SwaggerResponse(403, "권한 없음")]
+    [SwaggerResponse(404, "서비스를 찾을 수 없음")]
+    [SwaggerResponse(409, "이미 존재하는 서비스명")]
+    public async Task<IActionResult> UpdateAsync([FromBody] UpdateServiceRequestDto request)
+    {
+        var result = await _serviceManagementService.UpdateAsync(request);
+        return Ok(ApiResponse<ServiceResponseDto>.Success(result));
+    }
+
     [HttpPost("list")]
     [SwaggerOperation(
         Summary = "서비스 목록 조회",
diff --git a/SPMS.Application/DTOs/Service/UpdateServiceRequestDto.cs b/SPMS.Application/DTOs/Service/UpdateServiceRequestDto.cs
new file mode 100644
index 0000000..2ed7b55
--- /dev/null
+++ b/SPMS.Application/DTOs/Service/UpdateServiceRequestDto.cs
@@ -0,0 +1,20 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace SPMS.Application.DTOs.Service;
+
+public class UpdateServiceRequestDto
+{
+    [Required(ErrorMessage = "서비스 코드는 필수입니다.")]
+    public string ServiceCode { get; set; } = string.Empty;
+
+    [StringLength(100, ErrorMessage = "서비스명은 100자 이내여야 합니다.")]
+    public string? ServiceName { get; set; }
+
+    [StringLength(500, ErrorMessage = "설명은 500자 이내여야 합니다.")]
+    public string? Description { get; set; }
+
+    [StringLength(500, ErrorMessage = "웹훅 URL은 500자 이내여야 합니다.")]
+    public string? WebhookUrl { get; set; }
+
+    public string? Tags { get; set; }
+}
diff --git a/SPMS.Application/Interfaces/IServiceManagementService.cs b/SPMS.Application/Interfaces/IServiceManagementService.cs
index 0b65d33..5d01a8c 100644
--- a/SPMS.Application/Interfaces/IServiceManagementService.cs
+++ b/SPMS.Application/Interfaces/IServiceManagementService.cs
@@ -5,6 +5,7 @@ namespace SPMS.Application.Interfaces;
 public interface IServiceManagementService
 {
     Task<CreateServiceResponseDto> CreateAsync(CreateServiceRequestDto request, long adminId);
+    Task<ServiceResponseDto> UpdateAsync(UpdateServiceRequestDto request);
     Task<ServiceListResponseDto> GetListAsync(ServiceListRequestDto request);
     Task<ServiceResponseDto> GetByServiceCodeAsync(string serviceCode);
     Task<ServiceResponseDto> ChangeStatusAsync(string serviceCode, ChangeServiceStatusRequestDto request);
diff --git a/SPMS.Application/Services/ServiceManagementService.cs b/SPMS.Application/Services/ServiceManagementService.cs
index 3a8cacb..d382fdd 100644
--- a/SPMS.Application/Services/ServiceManagementService.cs
+++ b/SPMS.Application/Services/ServiceManagementService.cs
@@ -77,6 +77,72 @@ public class ServiceManagementService : IServiceManagementService
         };
     }
 
+    public async Task<ServiceResponseDto> UpdateAsync(UpdateServiceRequestDto request)
+    {
+        var service = await _serviceRepository.GetByServiceCodeAsync(request.ServiceCode);
+        if (service is null)
+        {
+            throw new SpmsException(
+                ErrorCodes.NotFound,
+                "서비스를 찾을 수 없습니다.",
+                404);
+        }
+
+        var hasChanges = false;
+
+        // ServiceName 변경
+        if (request.ServiceName != null && request.ServiceName != service.ServiceName)
+        {
+            var nameExists = await _serviceRepository.ServiceNameExistsAsync(request.ServiceName);
+            if (nameExists)
+            {
+                throw new SpmsException(
+                    ErrorCodes.Conflict,
+                    "이미 존재하는 서비스명입니다.",
+                    409);
+            }
+            service.ServiceName = request.ServiceName;
+            hasChanges = true;
+        }
+
+        // Description 변경
+        if (request.Description != null && request.Description != service.Description)
+        {
+            service.Description = request.Description;
+            hasChanges = true;
+        }
+
+        // WebhookUrl 변경
+        if (request.WebhookUrl != null && request.WebhookUrl != service.WebhookUrl)
+        {
+            service.WebhookUrl = request.WebhookUrl;
+            hasChanges = true;
+        }
+
+        // Tags 변경
+        if (request.Tags != null && request.Tags != service.Tags)
+        {
+            service.Tags = request.Tags;
+            hasChanges = true;
+        }
+
+        if (!hasChanges)
+        {
+            throw new SpmsException(
+                ErrorCodes.NoChange,
+                "변경된 내용이 없습니다.",
+                400);
+        }
+
+        service.UpdatedAt = DateTime.UtcNow;
+
+        _serviceRepository.Update(service);
+        await _unitOfWork.SaveChangesAsync();
+
+        var serviceWithIps = await _serviceRepository.GetByIdWithIpsAsync(service.Id);
+        return MapToDto(serviceWithIps ?? service);
+    }
+
     private async Task<string> GenerateUniqueServiceCodeAsync()
     {
         const string alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";