Disclosed is a method for determining whether or not a machine-to-machine (M2M) group identifier (MGID) for identifying a multicast service flow shared by a group of M2M communication terminals in an M2M group zone allocated to a terminal is supported in a wireless access system that supports M2M communication. The method comprises the steps of: receiving, from a first base station, an ID of an M2M group zone to which the first base station belongs; receiving, from the first base station, an MGID and an ID of an M2M group zone in which the MGID is supported; receiving, from the first base station or from a second base station, an ID of an M2M group zone to which the second base station belongs; and determining whether or not the received MGID is supported on the basis of the received ID of the M2M group zone to which the second base station belongs.