The present invention relates to a wireless communication system, and a method for searching for or advertising a service and a device for the same. A method for searching for a service, according to one embodiment of the present invention, can comprise: transmitting a probe request frame to search for a device supporting a predetermined service desired by a first wireless device; receiving a probe response frame from a second wireless device supporting the predetermined service; transmitting, by the first wireless device, a service search request frame including a service name of the predetermined service to the second wireless device; and receiving a service search response frame from the second wireless device, wherein the service search response frame can include service status information indicating whether the predetermined service is available on the second wireless device.