The invention provides an automatic power-off control method, system and equipment. The automatic power-off control method specifically comprises the steps that when a vehicle stops operation, the state of a key switch of the vehicle is detected through the automatic power-off control equipment, under the condition that the key switch is disconnected, human identification information sent by induction equipment is received, when it is judged that a person exists in a driving cab of the vehicle through the received human identification information, a first control instruction is sent to alarm equipment, thus the alarm equipment is controlled to give an alarm so as to remind a user to disconnect the whole vehicle power-off switch of the vehicle. According to the scheme, the technical problemthat the electric quantity of a vehicle storage battery is continuously consumed by part of electric equipment which is not powered and controlled by the key switch due to the fact that only the keyswitch is disconnected and the whole vehicle power-off switch is forgotten to be disconnected is solved, and the service life of the vehicle storage battery can be prolonged.