Fuente: Wipo "IOT" A method for connecting an IOT device to an IOT network to which a plurality of IOT devices are connected, according to an embodiment, may comprise the steps of: requesting a user device for configuration information including access point (AP) information for connecting the IOT device to the IOT network and information about an account of a user; receiving the configuration information from the user device; transmitting the configuration information to the IOT device through a power line; and in order to prevent the configuration information from being transmitted to the outside of the IOT network, controlling transmission of the configuration information through the power line on the basis of a data characteristic of the configuration information.