The invention provides an 
oxygen cabin type gym air-conditioning 
system and a working method thereof. The 
oxygen cabin type gym air-conditioning 
system comprises an 
oxygen cabin type gymnasium, a central air-conditioning new air supplying main 
air channel, an air source purifying 
system, an air sterilization filtering device, an oxygen generator, an oxygen supplying device, a 
carbon dioxide lower air suction system and a negative oxygen 
ion generator. When an oxygen 
measuring instrument measures that 
oxygen content in the gymnasium is smaller than or equal to 22%, the oxygen generator starts to work to deliver oxygen into the gymnasium. When the oxygen 
measuring instrument measures that 
oxygen content in the gymnasium is greater than or equal to 30%, the oxygen generator does not work. When a 
carbon dioxide measuring instrument measures that CO2 content in the gymnasium is smaller than or equal to 3%, the 
carbon dioxide lower air suction system does not work. When the carbon dioxide measuring instrument measures that the CO2 content in the gymnasium is greater than or equal to 3%, greater than or equal to 5% or greater than or equal to 6%, an exhaust fan of the carbon dioxide lower air suction system respectively work at a low gear, a middle gear and a high gear. The oxygen cabin type gym air-conditioning system has the advantages of being reasonable in structure, simple in operating step, economic in cost and strong in practical applicability, thoroughly changes air property in the gymnasium and further changes 
physical function of a sporter.