A method for providing a human network management service in a wireless mobile communications terminal, the method comprising the steps of: receiving human network data from a social network service site; converting a schema of each received human network data into a predetermined schema; updating human network data in the wireless mobile communications terminal according to the converted schema; and displaying the updated human network data, wherein the method further comprises: upon receiving, from a user of the wireless mobile communications terminal, a request for extending a human network of the user of the wireless mobile communications terminal using human network data of a counterpart user, determining whether sharing human network data between the counterpart user and the user of the wireless mobile communications terminal is permitted, if sharing is permitted, determining whether human network data of the counterpart user exists in the mobile communications terminal, and if human network data of the counterpart user does not exist in the mobile communications terminal, acquiring human network data of the counterpart user from a mobile device of the counterpart user; converting a schema of the human network data of the counterpart user into the predetermined schema; determining whether a common acquaintance exists in each of human network data of the user of the wireless mobile communications terminal and the acquired human network data of the counterpart user; and, if the common acquaintance exists, displaying an indication of the common acquaintance, and wherein, when there is an acquaintance associated with multiple categories of acquaintances within the updated human network data, the multiple categories are displayed as overlapping each other. receiving human network data from a social network service site; converting a schema of each received human network data into a predetermined schema; updating human network data in the wireless mobile communications terminal according to the converted schema; and displaying the updated human network data, wherein the method further comprises: upon receiving, from a user of the wireless mobile communications terminal, a request for extending a human network of the user of the wireless mobile communications terminal using human network data of a counterpart user, determining whether sharing human network data between the counterpart user and the user of the wireless mobile communications terminal is permitted, if sharing is permitted, determining whether human network data of the counterpart user exists in the mobile communications terminal, and if human network data of the counterpart user does not exist in the mobile communications terminal, acquiring human network data of the counterpart user from a mobile device of the counterpart user; converting a schema of the human network data of the counterpart user into the predetermined schema; determining whether a common acquaintance exists in each of human network data of the user of the wireless mobile communications terminal and the acquired human network data of the counterpart user; and, if the common acquaintance exists, displaying an indication of the common acquaintance, and upon receiving, from a user of the wireless mobile communications terminal, a request for extending a human network of the user of the wireless mobile communications terminal using human network data of a counterpart user, determining whether sharing human network data between the counterpart user and the user of the wireless mobile communications terminal is permitted, if sharing is permitted, determining whether human network data of the counterpart user exists in the mobile communications terminal, and if human network data of the counterpart user does not exist in the mobile communications terminal, acquiring human network data of the counterpart user from a mobile device of the counterpart user; converting a schema of the human network data of the counterpart user into the predetermined schema; determining whether a common acquaintance exists in each of human network data of the user of the wireless mobile communications terminal and the acquired human network data of the counterpart user; and, acquiring human network data of the counterpart user from a mobile device of the counterpart user; converting a schema of the human network data of the counterpart user into the predetermined schema; determining whether a common acquaintance exists in each of human network data of the user of the wireless mobile communications terminal and the acquired human network data of the counterpart user; and, if the common acquaintance exists, displaying an indication of the common acquaintance, and wherein, when there is an acquaintance associated with multiple categories of acquaintances within the updated human network data, the multiple categories are displayed as overlapping each other.