User information back-up device of different kind terminal and method in ip terminal

An apparatus and a method for backing up user information of a heterogeneous terminal in an IP terminal are provided to perform a synchronization process or an image moving process without a personal computer by directly connecting the terminal and synchronize and backup data of the at least one or more heterogeneous terminals through one terminal. A terminal connection interface(100) is used for connection with a heterogeneous terminal(20). A temporary synchronization storage(300) temporarily stores phone number information of the connected and synchronized heterogeneous terminal. A synchronization controller(200) sets synchronization with the heterogeneous terminal if the heterogeneous terminal is connected through the terminal connection interface, and stores the phone number information of the connected heterogeneous terminal in the temporary synchronization storage. A data converter(400) performs data conversion between the phone number information of the heterogeneous terminal, stored in the temporary synchronization storage, and phone number information of an IP(Internet Protocol) terminal(10) stored in a data storage(500).