The present invention relates to a method and a device for transmitting a signal of mobility, for transmission or reception of a first radio access technology (RAT)-based signal in a wireless communication system. Specifically, the method comprises the steps of: generating a first RAT-based signal including a message relating to generation of an event; duplicating the message into a second RAT-based signal when the event is associated with a safety service; and transmitting the second RAT-based signal through a resource area associated with the first RAT when the event is associated with the safety service.