<;P>;PROBLEM TO BE SOLVED: To provide a sterilization system capable of sterilizing and deodorizing air fed into a large-space facility by a simple structure. <;P>;SOLUTION: The sterilization system comprises the large-space facility 100 such as a theater having a tiered audience seat part 102 in the rear of a screen 101 disposed in the front. A main ventilation path 105A to guide conditioned air from an air conditioner 110 and a plurality of air outlets 104 connected to the main ventilation path via a branched duct 105B are disposed in a ceiling part of the large-space facility. The main ventilation path has a chamber, and an air sterilization part to sterilize air by contacting the conditioned air with electrolytic water is disposed inside the chamber. The chamber also has an electrolytic water generating part to generate the electrolytic water to be fed to the air sterilization part. The conditioned air sterilized through the air sterilization part is blown out from the plurality of outlets 104 into the large-space facility 100, and the sterilized air is fed to the audience seat part 102. The blown-out air can be recirculated into the air conditioner 110 through a return space 108A in the front of the screen 107. <;P>;COPYRIGHT: (C)2009,JPO&INPIT