POWER SUPPLY SYSTEM AND POWER SUPPLY METHOD

The present invention appropriately distributes power from a commercial power supply and power supply to a plurality of loads within a building on the basis of a fire state and the states of the commercial power supply and power supply. A control device receives fire occurrence information indicating whether a fire has occurred, power outage occurrence information indicating whether a commercial power supply power outage has occurred, and power supply information indicating the remaining amount of energy of a power supply; determines the operations of a plurality of distribution boards on the basis of state information including the fire occurrence information, power outage occurrence information, and power supply information; and transmits operation instructions indicating the determined operations to the distribution boards. A control unit of a specific distribution board from among the plurality of distribution boards determines a threshold value for a measured value on the basis of an operation instruction and controls the closed/open state of a specific remote control breaker. The control unit of the specific distribution board determines whether the measured value exceeds the threshold value and controls the specific remote control breaker so as to open the same if the measured value is determined to exceed the threshold value.