The invention discloses a diversity transmission method in the technical field of wireless communication. The diversity transmission method comprises the following steps of: classifying services to be transmitted into high-priority services and low-priority services; simultaneously transmitting the high-priority services to a first channel and a second channel for diversity protective transmission, and transmitting the low-priority services to the first or second channel for non-diversity protective transmission. The embodiment of the invention also provides a corresponding diversity receiving method, a corresponding diversity receiving device, a corresponding diversity receiving system, a diversity transmission device and a diversity transmission system. The embodiment of the invention effectively increases spectrum utilization rate at the same time of ensuring the diversity transmission reliability of the high-priority services.