The invention discloses a quantum key wireless distribution method, device and system, and the method comprises the steps: transmitting a first key request to a key injection machine in a wireless mode, enabling the key injection machine to carry out the identity authentication based on the first key request, and transmitting a quantum key after the identity authentication is passed; receiving andstoring the quantum key sent by the key injection machine; and sending the received quantum key to the terminal equipment according to the received second key request, or periodically sending the received quantum key to the terminal equipment. According to the invention, a quantum key wireless distribution technology is adopted, the telephone television conference service of the power system andthe quantum key wireless distribution are organically combined, the flexibility of the quantum secret communication technology can be enhanced, a large number of optical fiber resources are saved, theeconomy of network operation is improved, the development cost is reduced, and the application range of the quantum key wireless distribution technology in the power service is expanded.