A control unit is provided which is capable of estimating a user's environment based on time and temperature before entering an air-conditioned room, and reflecting a result obtained from the estimation in the control of air-conditioning equipment.An interface section 105 receives user information indicating the state of a user in a first area and temperature data in the first area; a temperature-data recording section 107 records a period of time when the user has stayed in the first area, and by relating the temperature data to the period of time clocked by a timer section 106, records this temperature data as a temporal change in the temperature of the first area; a special-mode reference section 109 stores control information for changing the contents of a setting in air-conditioning equipment 104 provided in a second area; a special-mode time calculation section 110 calculates an execution time to execute a control operation of the air-conditioning equipment 104 based on the control information, using the period of time when the user has stayed in the first area, the temporal change in the temperature and a reference temperature which is a predetermined temperature; and an operation-data generation section 111 generates operation data for operating the air-conditioning equipment 104 during the execution time based on the control information.