System for automatic control of the driving mechanisms of shading and thermal screens installed in greenhouse facilities, in which the shading component contains a photocell and a regulator of the required illuminance, while a second component contains sensors detecting the outside temperature and the temperature in the greenhouse, a regulator of the desired temperature and a block serving to compare the outside temperature with the greenhouse temperature, characterized in that the shading component contains a sampling pulse generator (9) with a time delay regulator (9a), which is coupled to a block (5) forming pulses indicating whether or not the required illuminance has been exceeded, and to a reverse counter block (10), connected via a day-night key block (11) to mechanisms performing the shading or unshading, while in the thermal shading component the unshading key block (19) is controlled by a generator (20) which times the unshading mechanisms with performance mechanism operating time determined using r
