An artificial intelligence (AI) intelligent automatic control system used for an air detoxification machine belongs to the purifier technology field. A humidity sensor adopts a chip sht20 and is installed on an air detoxification machine pedestal. A detected humidity signal is transmitted to a main control chip STM32F103CBT6. The main control chip transmits the signal to a subsequent forward regulation circuit and/or a negative regulation circuit composed of TS3A5017 and TL494, a duty ratio is adjusted and a needed stable voltage is acquired. According to the different humidity, an appropriatehigh voltage is acquired. The negative oxygen ions of the air detoxification machine can be transmitted far, and a high adsorption capacity is achieved, and electrical noise and electrical safety problems are not generated. In the invention, an artificial intelligence (AI) technology is applied, intelligent automatic control (without manual intervention) is realized, the system is good for the stability and the reliability of an air detoxification machine equipment function, the usage comfortableness and the electrical safety of equipment, and the universality of a usage environment are increased, and the system is good for the usage frequency of the air detoxification machine, and market competitiveness is increased.