Gateway control equipment, method and system

The invention discloses a gateway control equipment, method and system. The gateway control equipment comprises an access switch, a sound monitor, a warner and a preventer, wherein the sound monitor and the access switch establish an electric connection to detect whether the access switch exits triggering operation or not; the sound monitor and the warner establish an electric connection to trigger the warner to give an alarm; the sound monitor and the preventer establish an electric connection to control whether the preventer is locked or not. The gateway control equipment, method and system can solve the problem that potential safety hazards that a public wireless network is prone to being modified exist due to the popularization of the public wireless network.