Cooperative downloading can increase the amount of received data for mobile users accessing the Internet via WIFI in highway scenarios where The Access Points (APs) distribute sparsely[2]. In the case of multi-requests from different users, however, some schemes such as random selection or FIFO method not only fail to distinguish different users' service demands, but also bring little benefit for service providers. To address the problem, this paper proposes a cooperative downloading strategy with multi-class request. The strategy distinguishes users' downloading priorities according to user-defined downloading class. Under satisfying the fairness of system operation condition, the strategy provides different services according to users' expectation. Furthermore, the strategy helps service providers obtain the most benefit by making use of the repetition ratio of data and user-defined class. Simulation results indicate the benefits of the proposed scheme in terms of increasing service quality for users and benefit for services providers.