To supply fire extinguishing foam solution of required flow rate in accordance with flow rate of the fire extinguishing foam solution required for every protection compartment for extinguishment and also to stably supply the fire extinguishing foam solution with prescribed concentration when the flow rate of the fire extinguishing foam solution changes in foam extinguishing equipment.

Inverter control of a pressurized water supply device is performed according to a target solution supply pressure value for every protection compartment which is registered beforehand to a storage part, feedback control of solution delivery pressure of the fire extinguishing foam solution in the protection compartment where fire has broken out is performed, and feedback control of a delivery amount of a foam extinguishing agent is performed so that the concentration of the fire extinguishing foam solution may become a prescribed value. In another way, the delivery amount of a foam extinguishing agent is controlled according to flow rate of fire extinguishing water so that a prescribed mixing ratio may be attained.