The present invention relates to a method by which a user device controls a target device by using Bluetooth low energy technology in a wireless communication system, and an apparatus. According to the present invention, provided are a method and an apparatus for: discovering a first gateway for controlling at least one target device through a voice signal; receiving a first voice signal for controlling the at least one target device from a user; transmitting user information for identifying the user and the first voice signal to the searched for first gateway; and receiving, from the first gateway, a second voice signal or data indicating a control result with respect to the first voice signal.