Abstract: The system includes a computer server receiving data representative of the temperature of the cabin and including a database containing, for the aircraft, a predetermined cycle of regulation of the temperature of the air of the cabin; a ground pre-conditioned air unit including: a pre-conditioned air generator and a control module; and a user interface connected to the computer server and transmitting a control signal to the control module; and the control module, upon receiving the control signal, controlling the pre-conditioned air generator, according to the predetermined cycle, which is modulated depending on the data. This system makes it possible to control the temperature of the cabin in real time, so as to correctly disinfect it.