To provide a carpet system which uses convection of air to sufficiently and efficiently remove an offensive odor from a bed in a hospital, a bed-ridden aged person, a pet such as a dog, a cat, etc., and moisture to prevent a bedsore, and further can supply cool wind containing anions to a human body and execute static electricity therapy.

A metallic member 24 with titanium oxide adhered on the surface is set on a UV transmitting resin made air circulation tube 16 with a plurality of pores 26. A pump 20 is set in the air circulation tube to supply air or to suck in air from the outside of the tube.