The present invention relates to a method by which a terminal transmits/receives a signal in a wireless communication system and a device therefore and, more particularly, to: a method comprising the steps of receiving configuration information related to the activation or the deactivation of a wake-up signal (WUS), and monitoring the WUS and a channel corresponding to the WUS, when the WUS is activated on the basis of the configuration information, wherein the configuration information related to the activation or the deactivation of the WUS is configured to be terminal-specific; and a device therefor.