The subject of the invention is an automatic airconditioner disinfection system, making possible the elimination of the microorganisms settled in the filter units, air-tube systems and heat exchanger systems of air conditioning equipment, ensuring this way the supply of contagious matter-free, clean air. The automatic airconditioner disinfection system, according to the invention, containing a cartridge, disinfectant, a vaporizer head, which is characterized by that, cartridge(s) (3) filled with quantity of disinfectant (8) under overpressure, proportioned to the capacity of the flues (4) of the air-conditioning system are located in the air- conditioning unit (1) of the air-conditioning system, or in the storage unit (19) placed directly next to the air-conditioning unit (1), where said cartridge(s) (3) is automatically trimmed-off, interposing a manual, or electronic timer switch, in a point of time and order, determined in advance, at the receipt of the signal from the starting switch (6), and in given case the disinfectant (8) is injected (BE) into the flue (4) of the air- conditioning system through the conduit (18) and the vaporizer head (10), then the disinfectant (8) is kept in the flues (4) of the air-conditioning system for a proper contact time, then after the expiry of the cleaning phase (TI) it is removed from the flues (4) of the air-conditioning system by ventillation (SZE). The automatic airconditioner disinfection system accoeding to the invention, containing unit radiating ultraviolet light, and lamp, which is characterized by that, a unit, and lamp(s) radiating ultraviolet light are placed at the access of the flue (4) leading out of the air-conditioning unit (1) of the air-conditioning system, or in case of demand at the proper points of the flues (4) of the air-conditioning system in such a way, that with the help of the interposed manual or electronic timer switch at proper time periods the surface of the flues (4) and the air flowing through t
