The invention discloses a broadband wireless transmission method and a broadband wireless transmission system, a transmitter and a method, as well as a receiver and a method under high-speed movement environment. High-speed baseband signals serially input by a transmitting end are converted to be low-speed parallel baseband signals by series-to-parallel conversion, then MFDM (Multi-Frequency Difference Modulation) mapping is conducted, time-domain baseband signals are converted to be frequency-domain baseband signals which are converted to be time domain signals by IFFT (Inverse Fast Fourier Transform), a CP (Cyclic Prefix) is inserted and the parallel-to-series conversion is conducted, then the signals are sent to a radio frequency module and then are sent to an antenna to be transmitted, a receiving end converts the signals received by the antenna into digital baseband signals through the radio frequency module, the position synchronization is realized by a synchronization module, then the signals are subjected to series-to-parallel conversion, the CP is removed, the signals are sent to an FFT (Fast Fourier Transform) module and are converted to be frequency-domain baseband signals, then the MFDM mapping is removed, and time-domain baseband information is recovered. The Doppler frequency deviation caused by intersymbol interference and high-speed movement due to multipath propagation can be overcome, and the hardware structure of the receiver is simplified greatly due to the avoidance of channel estimation.