A method according to an embodiment of the present invention relates to a method for automatically mapping a smart plug and an electronic device connected thereto in a home gateway. The method may comprise the steps of: deleting pre-stored mapping information when a signal received from the smart plug satisfies a condition requiring remapping to the electronic device; configuring a mapping candidate group on the basis of data included in the signal received from the smart plug and information stored for the electronic device when a status change notification signal is received from a predetermined electronic device within a preconfigured time; and when it can be determined that one particular electronic device from among the configured candidate group has been mapped to the smart plug, automatically mapping the corresponding electronic device and the smart plug in a state that the corresponding electronic device is connected to the smart plug.