<p>A method for converging an address book at network side includes: acquiring static information and dynamic information of a user's contact, wherein the static information is invariable, and the dynamic information is variable within a specified time; converging the static information and the dynamic information of the contact; providing the converged information of the contact to all or part of terminals used by the user. A server, system and client end for converging an address book are also provided.</p>
