Method and system for obtaining on-line service are provided. The method may include: a vehicle mounted system sending a first piece of information about its capability and a request for an on-line service to a mobile communication device connected to the vehicle mounted system; and the vehicle mounted system receiving contents of the on-line service from the mobile communication device, where the contents of the on-line service are obtained by processing to match the capability of the vehicle mounted system. Computation load of the vehicle mounted system may be reduced and more utilization may be realized.