1. A method for providing a precise location-based information service for a user of a mobile terminal browser, including: acquiring at least two types of positioning references based upon a positioning service request from a user, the positioning references including Wireless Fidelity (WIFI) information and Global Positioning System (GPS) information, the WIFI information indicating coordinates of a WIFI access point providing services to the mobile terminal, the coordinates of the WIFI access point being used as positioning information of the mobile terminal; establishing correlation relationships among the positioning references based on the acquired positioning references; and performing integrated positioning and cross-validation on a precise location of the user based on the correlation relationships among the positioning references to determine final positioning service information, wherein the cross-validation further includes: when a distance between coordinates of the WIFI information and coordinates of the GPS information exceeds an accuracy range of the WIFI information, replacing coordinates of the WIFI information with new coordinates based on the GPS coordinates; wherein: the positioning references further include base station information, the base station information indicating coordinates of a base station in a mobile phone network providing services to the mobile terminal, the coordinates of the base station being used as positioning information of the mobile terminal; and performing integrated positioning further includes: when the at least two types of positioning references are acquired simultaneously, determining the precise location of the user by using: the GPS information, when the acquired at least two types of positioning references include the GPS information; or the WIFI information, when the acquired at least two types of positioning references do not include the GPS information; and when multiple base stations information or WIFI information is acquired simultaneously, using a center point of multiple position coordinates of the multiple base stations information as the base station information, or using a center point of multiple position coordinates of the multiple WIFI information as the WIFI information.