The invention aims to provide a method and a device for searching individual information of a user. Specifically, the method comprises steps of establishing or updating associated information of a first network device and a second network device, wherein the associated information comprises a mapping relation of first account number information of the user in the first network device and second account number information of the user in the second network device; combined with the associated information, obtaining individual information search results comprising individual information of the user at a second network device end and matched with a query sequence input by the user; providing the individual information search results for the user. Compared with the prior art, by establishing the associated information of the first network device and the second network device, and obtaining the individual information search results matched with the query sequence input by the user according to the associated information, search of the individual information of the user is achieved, and efficiency for obtaining the individual information of the user is improved.