A method to species identification of the terminal and the external system

The present invention discloses species retrieving terminal external identifier, comprising: a correspondence relationship external identification reference numerals with a terminal external identifier of the network side stores the terminal; and when the terminal in response to a trigger request of the MTC server, the network side with reference to the external identifier of the terminal in accordance with number and the corresponding relationship, to find the external ID number corresponding to the reference terminal; systems of the present invention further provides a terminal exterior to species identification. According to the present invention, the external network can retrieve the identity of the terminal, thereby identifying the correct response to an external trigger request terminal MTC server.