OPERATION CONTROL SYSTEM, OPERATION CONTROL DEVICE, AND OPERATION CONTROL METHOD

Provided is an operation control system capable of suppressing a decrease in the efficiency of demand response control. An operation control system (100) includes a storage unit (71) and a determination unit (72). The storage unit stores electric-power information. On the basis of the electric-power information, the determination unit determines a special-operation timing at which a special operation of a refrigerant cycle apparatus installed in at least one property or at least one area is to be executed. The electric-power information includes at least one of electric-power supply demand adjustment request information related to an electric-power supply demand adjustment request from the outside to the property or the area, and electric-power market price information related to an electric-power market price. The special operation includes at least one of a cooling-time oil return operation that is an oil return operation during a cooling operation of the refrigerant cycle apparatus, a heating-time oil return operation that is an oil return operation during a heating operation of the refrigerant cycle apparatus, and a defrosting operation during a heating operation of the refrigerant cycle apparatus.