The present disclosure relates to communication technologies, and particularly, to a method, apparatus and system for maintaining contact information. The embodiment of the present invention provides a method for maintaining contact information, including: acquiring address book information of a user and authorization settings of the address book information of the user and saving the acquired in an address book server, receiving a subscription request from a subscriber device, and establishing, according to confirmation information from the subscribed-for user regarding the subscription request from the subscriber device, a subscription relation list for a subscribed-for user and subscriber device and updating, by the address book server, address book information of the subscriber device according to a subscription relation and authorization in the subscription relation list when the subscribed-for user modifies the address book information of the subscribed-for user in the address book server.