Heating and cooling system

A heating and cooling system, which includes a refrigerant circulation circuit, first and second targets, first and second refrigerant circuits, a first switching section, and a control device, is disclosed. The first switching section is selectively switched between a first position at which a refrigerant discharged from a discharge area of a compressor is permitted to flow to the first target and a second position at which the refrigerant is not permitted to flow to the first target. The control device switches the first switching section to the first position so that the refrigerant circulation circuit functions as a first refrigerant circuit, thereby heating the first target and cooling the second target. The control device switches the first switching section to the second position so that the refrigerant circulation circuit functions as a second refrigerant circuit, thereby cooling only the second target.