POWER SUPPLY/DEMAND ADJUSTMENT SYSTEM AND POWER SUPPLY/DEMAND ADJUSTMENT METHOD

To optimize balance of supply and demand by making a demand amount of electric power as the whole of a plurality of charging apparatuses fluctuate while reflecting an idea of a manager of the charging apparatuses. A power supply/demand adjustment system 1 has a store information management server 220 configured to store information relating to power utilization at stores 300, power management servers 310 provided for each of the stores 300 and configured to manage operation of quick chargers 350, or the like, and an operation management server 210. The operation management server 210 receives a demand response, replaces the received demand response with a commit type demand response set for each of the stores 300 by utilizing at least one piece of information stored in the store information management server 220, and transmits the replaced commit type demand response to the power management server 310 of the respective stores 300.