An information management method and an information management system are provided. The method mainly includes the following steps. A first message is sent to a foreign agent (FA) of a mobile station (MS) after a paging controller (PC) is redirected. The first message includes information of a new PC after redirection. The FA stores the information of the new PC and sends a response message to the first message to the PC. The following technical effects are achieved by the present invention through the above technical solutions. An anchor PC before redirection or a new anchor PC after redirection reports an ID of the new anchor PC to the FA, so the FA gets to know an address of the new anchor PC when paging and thus implements the paging process successfully.