A method for managing a terminal group, comprising: a home subscriber information unit sending group information of a terminal group to a machine type communication interworking function, MTC IWF, and the MTC IWF storing the group information; and after receiving a request message of the terminal group sent by a server, the MTC IWF executing a terminal group process relevant to the request message according to the group information; wherein the request message is a terminal group trigger request and the step of executing a terminal group process relevant to the request message according to the group information comprises: after receiving the trigger request, the MTC IWF obtaining a terminal group identity or a terminal identity collection in the trigger request, searching for an address of a group representative mobility management unit corresponding to the terminal group according to the group information, constructing a new trigger message comprising an internal identity replacing the terminal group identity or terminal identity collection of the trigger request, said internal identity corresponding to the terminal group identity or terminal identity collection, and sending the trigger message to the group representative mobility management unit which is searched out; or, the request message is a terminal group accessibility request and the step of executing a terminal group process relevant to the request message according to the group information comprises: after receiving the terminal group accessibility request, the MTC IWF obtaining a terminal group identity or a terminal identity collection in the request message, searching for an accessibility indication corresponding to the terminal group according to the group information and returning a result of the search to the server; the method further comprising: the home subscriber information unit notifying the MTC IWF to update the group information after detecting that the group information is changed. a home subscriber information unit sending group information of a terminal group to a machine type communication interworking function, MTC IWF, and the MTC IWF storing the group information; and after receiving a request message of the terminal group sent by a server, the MTC IWF executing a terminal group process relevant to the request message according to the group information; wherein the request message is a terminal group trigger request and the step of executing a terminal group process relevant to the request message according to the group information comprises: after receiving the trigger request, the MTC IWF obtaining a terminal group identity or a terminal identity collection in the trigger request, searching for an address of a group representative mobility management unit corresponding to the terminal group according to the group information, constructing a new trigger message comprising an internal identity replacing the terminal group identity or terminal identity collection of the trigger request, said internal identity corresponding to the terminal group identity or terminal identity collection, and sending the trigger message to the group representative mobility management unit which is searched out; or, the request message is a terminal group accessibility request and the step of executing a terminal group process relevant to the request message according to the group information comprises: after receiving the terminal group accessibility request, the MTC IWF obtaining a terminal group identity or a terminal identity collection in the request message, searching for an accessibility indication corresponding to the terminal group according to the group information and returning a result of the search to the server; the method further comprising: the home subscriber information unit notifying the MTC IWF to update the group information after detecting that the group information is changed. <EOS>