Address book updating method and address book updating system

The invention relates to an address book updating method and an address book updating system. The method comprises the following steps: a mobile terminal acquires personal updating information of a user and storing the personal updating information in a first character string array, the mobile terminal acquires information of contacts in an address book of the user, and storing the information of the contacts in a second character string array, and the mobile terminal generates an XML request file according to the first character string array and the second character string array and sends the XML request file to a server; the server receives the XML request file, parses the XML request file to acquire the first character string array and the second character string array, generates an XML updating file according to the first character string array, and sends the XML updating file to the contacts; and receivers receive and parse the XML updating file to acquire the personal updating information, query contact information corresponding to the personal updating information in an address book and update the contact information. Timely and quick address book updating is realized.