Embodiments of the present disclosure provide a paging method, a device, and a system, and relate to the communications field, so as to reduce signaling exchange performed when an access network device pages UE, save a network resource, and improve data transmission efficiency. The paging method includes: receiving, by user equipment (UE), paging information sent by an access network device, where the paging information is used to instruct the UE to send a paging response by using an uplink data sending resource; and obtaining, by the UE, the uplink data sending resource according to the paging information, and sending paging response information to the access network device by using the uplink data sending resource.