A temperature adjustment system comprising: a system controller; a first temperature measurer measuring a first air temperature in a first place within a building and transmitting a measurement result to the system controller; a second temperature measurer (13, 15) measuring a second air temperature in a second place within the building and transmitting a measurement result to the system controller; a sucker sucking air from the first place into a duct installed in the building; and a discharger (14, 16) discharging the air taken from the first place via the duct into the second place, wherein the system controller comprises: a suction controller configured for controlling the operation of the sucker; a discharge controller configured for controlling the operation of the discharger (14, 16); and an adjustment necessity determiner configured for determining whether it is necessary to adjust an air temperature difference between the first and second places based on the first air temperature measured by the first temperature measurer and the second air temperature measured by the second temperature measurer (13, 15), wherein if the adjustment necessity determiner determines that the adjustment is necessary, the suction controller orders the sucker to start operation and the discharge controller orders the discharger (14, 16) to start operation; characterized by further comprising: a time window information storage storing anticipated moving time window information presenting a time window in which the user is anticipated to move from the first place to the second place, wherein the adjustment necessity determiner conducts the determination a predetermined time before the start time of the time window presented by the anticipated moving time window information stored in the time window information storage. a system controller; a first temperature measurer measuring a first air temperature in a first place within a building and transmitting a measurement result to the system controller; a second temperature measurer (13, 15) measuring a second air temperature in a second place within the building and transmitting a measurement result to the system controller; a sucker sucking air from the first place into a duct installed in the building; and a discharger (14, 16) discharging the air taken from the first place via the duct into the second place, wherein the system controller comprises: a suction controller configured for controlling the operation of the sucker; a discharge controller configured for controlling the operation of the discharger (14, 16); and an adjustment necessity determiner configured for determining whether it is necessary to adjust an air temperature difference between the first and second places based on the first air temperature measured by the first temperature measurer and the second air temperature measured by the second temperature measurer (13, 15), wherein if the adjustment necessity determiner determines that the adjustment is necessary, the suction controller orders the sucker to start operation and the discharge controller orders the discharger (14, 16) to start operation; characterized by further comprising: a time window information storage storing anticipated moving time window information presenting a time window in which the user is anticipated to move from the first place to the second place, wherein the adjustment necessity determiner conducts the determination a predetermined time before the start time of the time window presented by the anticipated moving time window information stored in the time window information storage. a suction controller configured for controlling the operation of the sucker; a discharge controller configured for controlling the operation of the discharger (14, 16); and an adjustment necessity determiner configured for determining whether it is necessary to adjust an air temperature difference between the first and second places based on the first air temperature measured by the first temperature measurer and the second air temperature measured by the second temperature measurer (13, 15), wherein if the adjustment necessity determiner determines that the adjustment is necessary, the suction controller orders the sucker to start operation and the discharge controller orders the discharger (14, 16) to start operation; characterized by further comprising: a time window information storage storing anticipated moving time window information presenting a time window in which the user is anticipated to move from the first place to the second place, wherein the adjustment necessity determiner conducts the determination a predetermined time before the start time of the time window presented by the anticipated moving time window information stored in the time window information storage. a time window information storage storing anticipated moving time window information presenting a time window in which the user is anticipated to move from the first place to the second place, wherein the adjustment necessity determiner conducts the determination a predetermined time before the start time of the time window presented by the anticipated moving time window information stored in the time window information storage.