To provide a cooling and heating device by a natural wind flow capable of assisting cooling and heating by a ventilation device from an under floor to a roof space with a consecutive manner, using natural power, as indoor cooling and heating carried out by electricity, gas, petroleum or the like brings a problem of a global warming effect in the recent.

Air is reserved in a tank buried under the ground from a ventilation hole, the cooled cold air is fed to a room, heated air in the room is discharged, the room is circulated with the cold air, and warm air is reserved in a winter. The clean cooling and heating is attained without carrying out the cooling and heating by the electricity, gas, or the like.