Using the microorganism, such as room temperature, and at atmospheric pressure is also easy bacteria or fungi present on the skin a sterile sieve Gaseous Chlorine Dioxide to quickly insert the sterilized object, such as medical or surgical instruments inside the sterilization chamber is opened and closed by the door, and then the present invention is the present invention relates to the medical use of chlorine dioxide gas sterilizers and sterilization of the sterilization process controller. As well as medical devices that may be useful in the sterilization operation by using the veterinary field, and other sterilizing gas chlorine dioxide gas sterilizer in accordance with the present invention ?? used sterilization chamber, ?? stabilized chlorine dioxide and the maximum peak wavelength 253.7nm, ultra-violet radiated power 1.2 ~ 11mW / amount of the ?? generated by generating a photo-chemical reaction with ultraviolet Wet Gaseous Chlorine Dioxide Wet Gaseous Chlorine Dioxide Generator, ?? photo ionization detector Censor, to measure the concentration in the chamber Wet Gaseous Chlorine Dioxide ?? for controlling the sterilization process Chlorine Dioxide Electronic Control System, ?? Optional Carbon Scrubber System consists of removing the Gaseous Wet Chlorine Dioxide and stay in the chamber after the sterilization process is complete. As a medical sterilizer with chlorine dioxide gas is a commercial product in the world, received the first approval of the Food and Drug Department prepared items (KFDA).