The instant disclosure relates to a chassis structure for industrial uninterruptible power supply system including: a chassis having a frame and a front side panel, left side panel, right side panel, rear side panel and top panel installed on the frame; the chassis has a plurality of spacer on the bottom thereof for lifting the chassis from the ground for a distance to forming a gas-intake space; a plurality of protective plates disposed around the gas-intake space, each protective plate has a plurality of gas-intake hole; a bottom plate structure disposed between the bottom of the chassis and the gas-intake space and has at least a gas-intake gap; at least a venting hole disposed on the top panel of the chassis, each venting hole has at least an exhaust fan for outputting a gas from the chassis.