The embodiment of the invention discloses a service finding method. The service finding method comprises the steps that first equipment builds a zero datagram request frame which is a physical frame not containing a media access control layer protocol data unit, and the zero datagram request frame contains frame type information of the zero datagram request frame, and service type information and service mark information of first equipment; the zero datagram request frame is sent to enable second equipment to receive the zero datagram request frame, and whether the first equipment is matched with the service requirement of the second equipment is judged; response information fed back by the second equipment after it is determined that the first equipment is matched with the service requirement of the second equipment is received, and service finding of the second equipment is finished. The embodiment of the invention further discloses a service finding device. Through the service finding method and device, service finding can be achieved through a short frame, power consumption is reduced, occupation of a channel is reduced, and the medium utilization rate is improved.