The present invention relates to disinfection, chlorine dioxide (ClO 2) disinfecting and deodorizing air sterilization with concentration maintenance and circulation of chlorine dioxide for recycle, while maintaining constant the concentration of circulating a chlorine dioxide solution of the apparatus and method of the air as, Disinfection deodorizer 200 is mixed when supplied with solution from sodium chlorite (NaClO 2), the storage tank 220, and acids (organic acids and inorganic acids) reservoir 230, each reservoir 220, 230 is installed on one side and jetting nozzles (211 installed on the upper portion of the mixer 250, and a device 200 for discharging the chlorine dioxide solution formed by these reactions can spray a chlorine dioxide solution which accumulated in the lower portion of the apparatus 200, , 212) and is provided on a central portion of the device 200, the injection nozzle 211, the injection or, mixer 250, the filling layer 260 and each reservoir is falling chlorine dioxide solution which is injected from the (220, 230 from ) supplied from the air pump 240 and solenoid valve 241, and, a chlorine dioxide solution that is retained in the lower portion of the upper spray nozzles 211 and 212 of the apparatus 200 for controlling a solution supply to the mixer (250) and a circulation pump (210), In the beginning of the sterilization deodorization process wherein, through a mixer 250, discharging the chlorine dioxide solution, a certain amount of time after which, but spraying the chlorine dioxide solution of the lower device 200 via the injection nozzle (211, 212) device (200 ) if the chlorine dioxide concentration in the schedule below through the mixer 250 and discharged to add chlorine dioxide solution characterized in that to maintain a constant concentration of chlorine dioxide in the apparatus 200.본 발명은 공기의 살균, 이산화염소(ClO2)의 농도를 일정하게 유지하면서 이산화염소 용액을 순환시켜 재활용하는, 이산화염소의 농도 유지와 순환 기능을 가진 공기 살균 소독 및 탈취 장치 및 그 방법에 관한 것으로서,살균 소독 탈취 장치(200)는 일측에 설치되는 아염소산
