diff --git a/SPMS.API/Controllers/DeviceController.cs b/SPMS.API/Controllers/DeviceController.cs
index 093c7bc..ab3f1a4 100644
--- a/SPMS.API/Controllers/DeviceController.cs
+++ b/SPMS.API/Controllers/DeviceController.cs
@@ -73,6 +73,15 @@ public class DeviceController : ControllerBase
         return Ok(ApiResponse.Success());
     }
 
+    [HttpPost("admin/delete")]
+    [Authorize]
+    [SwaggerOperation(Summary = "관리자 기기 삭제", Description = "관리자가 기기를 삭제(비활성화)합니다. 삭제 즉시 발송이 차단됩니다. JWT 인증 필요.")]
+    public async Task<IActionResult> AdminDeleteAsync([FromBody] DeviceDeleteRequestDto request)
+    {
+        await _deviceService.AdminDeleteAsync(request.DeviceId);
+        return Ok(ApiResponse.Success());
+    }
+
     [HttpPost("list")]
     [Authorize]
     [SwaggerOperation(Summary = "디바이스 목록", Description = "대시보드에서 디바이스 목록을 조회합니다. JWT 인증 필요.")]
diff --git a/SPMS.Application/Interfaces/IDeviceService.cs b/SPMS.Application/Interfaces/IDeviceService.cs
index b2cdb44..a8d9a98 100644
--- a/SPMS.Application/Interfaces/IDeviceService.cs
+++ b/SPMS.Application/Interfaces/IDeviceService.cs
@@ -8,6 +8,7 @@ public interface IDeviceService
     Task<DeviceInfoResponseDto> GetInfoAsync(long serviceId, DeviceInfoRequestDto request);
     Task UpdateAsync(long serviceId, DeviceUpdateRequestDto request);
     Task DeleteAsync(long serviceId, DeviceDeleteRequestDto request);
+    Task AdminDeleteAsync(long deviceId);
     Task<DeviceListResponseDto> GetListAsync(long? serviceId, DeviceListRequestDto request);
     Task SetTagsAsync(long serviceId, DeviceTagsRequestDto request);
     Task SetAgreeAsync(long serviceId, DeviceAgreeRequestDto request);
diff --git a/SPMS.Application/Services/DeviceService.cs b/SPMS.Application/Services/DeviceService.cs
index bde9344..68ccdbd 100644
--- a/SPMS.Application/Services/DeviceService.cs
+++ b/SPMS.Application/Services/DeviceService.cs
@@ -119,6 +119,19 @@ public class DeviceService : IDeviceService
         await _tokenCache.InvalidateAsync(serviceId, device.Id);
     }
 
+    public async Task AdminDeleteAsync(long deviceId)
+    {
+        var device = await _deviceRepository.GetByIdAsync(deviceId);
+        if (device == null)
+            throw new SpmsException(ErrorCodes.DeviceNotFound, "존재하지 않는 디바이스입니다.", 404);
+
+        device.IsActive = false;
+        device.UpdatedAt = DateTime.UtcNow;
+        _deviceRepository.Update(device);
+        await _unitOfWork.SaveChangesAsync();
+        await _tokenCache.InvalidateAsync(device.ServiceId, device.Id);
+    }
+
     public async Task<DeviceListResponseDto> GetListAsync(long? serviceId, DeviceListRequestDto request)
     {
         Platform? platform = null;