The disclosure provides a positioning service method and system, and a terminal. In the above method, a positioned terminal receives a movement track model established by a positioning service platform; the positioned terminal judges whether or not positioning data that are collected satisfy the movement track model; and when the positioning data satisfy the movement track model, it is determined that there is no need to report the positioning data, and when the positioning data do not satisfy the movement track model, the positioning data are reported to the positioning service platform. The technical solution provided by the disclosure can reduce the frequency for the positioned terminal to report the positioning data and also save network data traffic for the user.