The disclosure discloses a method for triggering a terminal group, including that a network side sending a group triggering message to each terminal of the terminal group, wherein the group triggering message is used for indicating each terminal of the terminal group to connect to the network, and each terminal of the terminal group establishing connection with the network according to the group triggering message. The disclosure also discloses a system for triggering a terminal group, which realizes to synchronously trigger all the terminals of one terminal group, and makes the operator network better optimize the message volume of the terminal group which needs to receive the same messages when the Group Based Addressing characteristic of the terminal group is activated.