This equipment control system is provided with: a switching unit (103) which is provided in an air conditioner outdoor unit (101) that operates using direct-current power supplied from a storage battery and alternating-current power supplied from an alternating-current power source including a power grid, and which switches the power to be supplied to the air conditioner outdoor unit (101) to either direct-current power or alternating-current power; and a switching control unit (105) which determines whether the storage battery is in a discharged state, and causes the switching unit (103) to switch.
