To reduce operational costs by effectively using generated heat, and to reduce environmental loads.

Equipment of vaporizing liquefied gas includes a vaporizer 2 vaporizing liquefied gas by using seawater, cooling equipment 4 cooling equipment 5 to be cooled by using a prescribed refrigerant, and a heat exchanger 6 for raising a temperature of discharged sea water raising the temperature of the discharged seawater discharged from the vaporizer 2 by using the refrigerant.