diff --git a/SPMS.API/Controllers/ServiceController.cs b/SPMS.API/Controllers/ServiceController.cs
index 8af1835..6be0163 100644
--- a/SPMS.API/Controllers/ServiceController.cs
+++ b/SPMS.API/Controllers/ServiceController.cs
@@ -178,6 +178,35 @@ public class ServiceController : ControllerBase
         return Ok(ApiResponse<CredentialsResponseDto>.Success(result));
     }
 
+    [HttpPost("tags/list")]
+    [SwaggerOperation(
+        Summary = "태그 목록 조회",
+        Description = "서비스에 등록된 태그 목록을 조회합니다.")]
+    [SwaggerResponse(200, "조회 성공", typeof(ApiResponse<ServiceTagsResponseDto>))]
+    [SwaggerResponse(401, "인증되지 않은 요청")]
+    [SwaggerResponse(403, "권한 없음")]
+    [SwaggerResponse(404, "서비스를 찾을 수 없음")]
+    public async Task<IActionResult> GetTagsAsync([FromBody] ServiceTagsRequestDto request)
+    {
+        var result = await _serviceManagementService.GetTagsAsync(request);
+        return Ok(ApiResponse<ServiceTagsResponseDto>.Success(result));
+    }
+
+    [HttpPost("tags/update")]
+    [SwaggerOperation(
+        Summary = "태그 수정",
+        Description = "서비스의 태그 목록을 수정합니다. 최대 10개까지 등록 가능합니다.")]
+    [SwaggerResponse(200, "수정 성공", typeof(ApiResponse<ServiceTagsResponseDto>))]
+    [SwaggerResponse(400, "잘못된 요청 또는 변경 없음")]
+    [SwaggerResponse(401, "인증되지 않은 요청")]
+    [SwaggerResponse(403, "권한 없음")]
+    [SwaggerResponse(404, "서비스를 찾을 수 없음")]
+    public async Task<IActionResult> UpdateTagsAsync([FromBody] UpdateServiceTagsRequestDto request)
+    {
+        var result = await _serviceManagementService.UpdateTagsAsync(request);
+        return Ok(ApiResponse<ServiceTagsResponseDto>.Success(result));
+    }
+
     [HttpPost("{serviceCode}/ip/list")]
     [SwaggerOperation(
         Summary = "IP 화이트리스트 조회",
diff --git a/SPMS.Application/DTOs/Service/ServiceTagsRequestDto.cs b/SPMS.Application/DTOs/Service/ServiceTagsRequestDto.cs
new file mode 100644
index 0000000..04ecdbd
--- /dev/null
+++ b/SPMS.Application/DTOs/Service/ServiceTagsRequestDto.cs
@@ -0,0 +1,11 @@
+using System.ComponentModel.DataAnnotations;
+using System.Text.Json.Serialization;
+
+namespace SPMS.Application.DTOs.Service;
+
+public class ServiceTagsRequestDto
+{
+    [Required(ErrorMessage = "서비스 코드는 필수입니다.")]
+    [JsonPropertyName("service_code")]
+    public string ServiceCode { get; set; } = string.Empty;
+}
diff --git a/SPMS.Application/DTOs/Service/ServiceTagsResponseDto.cs b/SPMS.Application/DTOs/Service/ServiceTagsResponseDto.cs
new file mode 100644
index 0000000..8346db5
--- /dev/null
+++ b/SPMS.Application/DTOs/Service/ServiceTagsResponseDto.cs
@@ -0,0 +1,23 @@
+using System.Text.Json.Serialization;
+
+namespace SPMS.Application.DTOs.Service;
+
+public class ServiceTagsResponseDto
+{
+    [JsonPropertyName("service_code")]
+    public string ServiceCode { get; set; } = string.Empty;
+
+    public List<TagItemDto> Tags { get; set; } = new();
+
+    [JsonPropertyName("total_count")]
+    public int TotalCount { get; set; }
+}
+
+public class TagItemDto
+{
+    [JsonPropertyName("tag_index")]
+    public int TagIndex { get; set; }
+
+    [JsonPropertyName("tag_name")]
+    public string TagName { get; set; } = string.Empty;
+}
diff --git a/SPMS.Application/DTOs/Service/UpdateServiceTagsRequestDto.cs b/SPMS.Application/DTOs/Service/UpdateServiceTagsRequestDto.cs
new file mode 100644
index 0000000..5743503
--- /dev/null
+++ b/SPMS.Application/DTOs/Service/UpdateServiceTagsRequestDto.cs
@@ -0,0 +1,15 @@
+using System.ComponentModel.DataAnnotations;
+using System.Text.Json.Serialization;
+
+namespace SPMS.Application.DTOs.Service;
+
+public class UpdateServiceTagsRequestDto
+{
+    [Required(ErrorMessage = "서비스 코드는 필수입니다.")]
+    [JsonPropertyName("service_code")]
+    public string ServiceCode { get; set; } = string.Empty;
+
+    [Required(ErrorMessage = "태그 목록은 필수입니다.")]
+    [MaxLength(10, ErrorMessage = "태그는 최대 10개까지 등록할 수 있습니다.")]
+    public List<string> Tags { get; set; } = new();
+}
diff --git a/SPMS.Application/Interfaces/IServiceManagementService.cs b/SPMS.Application/Interfaces/IServiceManagementService.cs
index 19afd94..007a9e4 100644
--- a/SPMS.Application/Interfaces/IServiceManagementService.cs
+++ b/SPMS.Application/Interfaces/IServiceManagementService.cs
@@ -15,6 +15,10 @@ public interface IServiceManagementService
     Task RegisterFcmCredentialsAsync(string serviceCode, FcmCredentialsRequestDto request);
     Task<CredentialsResponseDto> GetCredentialsAsync(string serviceCode);
 
+    // Tags
+    Task<ServiceTagsResponseDto> GetTagsAsync(ServiceTagsRequestDto request);
+    Task<ServiceTagsResponseDto> UpdateTagsAsync(UpdateServiceTagsRequestDto request);
+
     // IP Whitelist
     Task<IpListResponseDto> GetIpListAsync(string serviceCode);
     Task<ServiceIpDto> AddIpAsync(string serviceCode, AddIpRequestDto request);
diff --git a/SPMS.Application/Services/ServiceManagementService.cs b/SPMS.Application/Services/ServiceManagementService.cs
index b70989b..1d8858a 100644
--- a/SPMS.Application/Services/ServiceManagementService.cs
+++ b/SPMS.Application/Services/ServiceManagementService.cs
@@ -454,6 +454,76 @@ public class ServiceManagementService : IServiceManagementService
         return response;
     }
 
+    public async Task<ServiceTagsResponseDto> GetTagsAsync(ServiceTagsRequestDto request)
+    {
+        var service = await _serviceRepository.GetByServiceCodeAsync(request.ServiceCode);
+        if (service is null)
+        {
+            throw new SpmsException(
+                ErrorCodes.NotFound,
+                "서비스를 찾을 수 없습니다.",
+                404);
+        }
+
+        return BuildTagsResponse(service);
+    }
+
+    public async Task<ServiceTagsResponseDto> UpdateTagsAsync(UpdateServiceTagsRequestDto request)
+    {
+        var service = await _serviceRepository.GetByServiceCodeAsync(request.ServiceCode);
+        if (service is null)
+        {
+            throw new SpmsException(
+                ErrorCodes.NotFound,
+                "서비스를 찾을 수 없습니다.",
+                404);
+        }
+
+        var newTagsJson = JsonSerializer.Serialize(request.Tags);
+        if (newTagsJson == service.Tags)
+        {
+            throw new SpmsException(
+                ErrorCodes.NoChange,
+                "변경된 내용이 없습니다.",
+                400);
+        }
+
+        service.Tags = newTagsJson;
+        service.UpdatedAt = DateTime.UtcNow;
+
+        _serviceRepository.Update(service);
+        await _unitOfWork.SaveChangesAsync();
+
+        return BuildTagsResponse(service);
+    }
+
+    private static ServiceTagsResponseDto BuildTagsResponse(Service service)
+    {
+        var tagNames = new List<string>();
+        if (!string.IsNullOrEmpty(service.Tags))
+        {
+            try
+            {
+                tagNames = JsonSerializer.Deserialize<List<string>>(service.Tags) ?? new List<string>();
+            }
+            catch
+            {
+                // Invalid JSON, return empty
+            }
+        }
+
+        return new ServiceTagsResponseDto
+        {
+            ServiceCode = service.ServiceCode,
+            Tags = tagNames.Select((name, index) => new TagItemDto
+            {
+                TagIndex = index,
+                TagName = name
+            }).ToList(),
+            TotalCount = tagNames.Count
+        };
+    }
+
     public async Task<IpListResponseDto> GetIpListAsync(string serviceCode)
     {
         var service = await _serviceRepository.GetByServiceCodeWithIpsAsync(serviceCode);