Fuente: Wipo "IOT" Provided are an IoT service method in which a server-centric global IoT service and a gateway-centric local IoT service are combined and carried out at the same time, and an IoT system for employing the same. Thereby, an IoT device is able to utilize an IoT gateway as an IoT server without being directly connected to the IoT server, thus making it possible for data to be collected in the IoT gateway, so that an IoT service can also be performed in the IoT gateway without going through the IoT server.