POWER SUPPLY SYSTEM AND POWER SUPPLY METHOD

A power supply system configured to quickly set a phase capable of increasing power received by a power receiving device, a power supply system, and a power supply method are provided. The power supply system includes a power supply device, and a first power receiving device configured to receive a power transmission signal transmitted from the power supply device. The power supply device includes an array antenna including a plurality of antennas configured to transmit power, and a power transmission controller configured to control a phase of the power transmission signal transmitted from the plurality of antennas to the first power receiving device and to perform power transmission control. The plurality of antennas are divided into a plurality of groups. Each group includes a plurality of antennas, each antenna being from among the plurality of antennas.