To ensure skiing and ice skating without being influenced by seasons, and facilitate alteration of equipment by achieving snow melting and ice melting in the equipment under use in a short time.

A plurality of wide area cooling structures 11a, etc., are embedded in the earth of a slope in a skiing ground, and artificial snow 10 is drawn from an artificial snowfall machine (not shown) on an upper surface of the wide area cooling structures 11a, etc. On the wide area cooling plates 11a, etc., cooling water is supplied to a heat discharge side of a Peltier device from a cooling water supply pipe 15, and warm water heated there is corrected in a water discharge tube 16 and is further supplied for reuse from a connection section 17 to a rest house located around a slope, etc. In the wide area cooling structures 11a, etc., an electronic cooling device comprising a Peltier device is subjected to current control or voltage control for setting the surface temperature of the cooling plate from ordinary temperature to -60°C.