Through this system the user can choose the operation mode of the hood, between manual or fully automatic. When the hob is switched on, the hood is automatically lit up and the suction speed is synchronized with the selected cooking power. Depending on the use time, the hood can remain switched on longer or automatically switch off. The user does not therefore need to touch the hood, thus avoiding dirtying it. Through the bi-directional transmission there is also the possibility that the hood, equipped with appropriate sensors, informs about the wetness, temperature and fume conditions, thus permitting to intervene promptly switching off the hob, if a pot has been forgotten on the cooking hob.