The present invention provides a method for a MTC group selecting a Packet Data Network Gateway (PGW) and a mobility management network element. After a MTC UE in the MTC group attaches for the first time, PGW information corresponding to the selected PGW is stored in a subscriber database; and when other MTC UEs in the MTC group attach, the PGW corresponding to the PGW information stored in the subscriber database is directly used as their own PGW. With the method of the present invention, it is guaranteed that the PGWs selected by multiple MTC UEs belonging to the same MTC group are the same PGW, thereby guaranteeing that the maximum flow and charging of each MTC group are effectively limited subsequently.