Radio frequency transmission method and system

Provided are a radio frequency transmission method and system. The radio frequency transmission method includes detecting transmission mass of a plurality of transmission paths corresponding to transmission of all data symbol flows to determine whether to use space block coding modules to transmit the data symbol flows by aid of the transmission diversity block coding technology through the plurality of transmission paths. When the transmission mass of at least one transmission path is detected to be larger than or equal to the preset value, a preprocessing module is electrically connected to one of the transmission paths and transmits the next data symbol flow through a single connected transmission path; otherwise, the preprocessing module is electrically connected to one space block coding module and transmits the data symbol flows by using the space block coding module by aid of the transmission diversity block coding technology through the corresponding transmission paths.