A cloud server includes an environment history DB storing in-room temperature history information representing a history of an in-room temperature change in a living room whose temperature is adjusted by an air-conditioner in relation to operation history information representing an operation history of the air-conditioner, an in-room environment predictor that predicts, as a predicted off-state in-room temperature, a future in-room temperature of the living room based on the in-room temperature history information and the operation history information for a case where the temperature is not adjusted by the air-conditioning apparatus, and an air conditioning setting unit that determines, based on the predicted off-state in-room temperature, a control parameter of the air-conditioner used to control the in-room temperature so as to reach a target temperature at a target time.