The invention discloses an encryption and authentication method of iBeacon broadcast messages. The method is additionally provided with an extra bluetooth broadcast packet, a dynamic identifier (ID) is sent in the bluetooth broadcast packet except an iBeacon original broadcast packet, and the problem that an iBeacon base station is occupied by a third party is effectively solved. A message authentication code or a digital signature, which dynamically changes with time, is sent in the broadcast packet except the iBeacon original broadcast packet, and the problem that the iBeacon base station is counterfeited is solved. The generated dynamic identifier and the generated message authentication code are combined so that the problem that iBeacon base station signals are occupied and counterfeited is solved.