A microwave AV (audio and video) radio transmission system for reduction in cabled transmission, upgraded signal quality and quantity, lowered production cost, and neater appearance includes a transmitter and a receiver. The transmitter is connected to a socket of an AV source system. The receiver is connected to a socket of a receiving system. Each of the transmitter and the receiver comprises a plug to be directly plugged into the sockets of the AV source system and the receiving system, respectively. No AV cable is required for the connection.