A control device comprising: a control unit configured to monitor and control at least a target device that is external to the control device; and an input display unit (320, 322) configured to display a monitoring and controlling screen extending in a longitudinal direction and a lateral direction, and to detect a touch operation performed by a user, the input display unit (320, 322) being further configured to display an object associated with the external target device; wherein when the input display unit (320, 322) determines that the user continues touching the monitoring and controlling screen at two points (A1, B1) and performs a rotating operation by a predetermined angle or more based on a relationship between touched positions of the two points (A1, B1) before and after movement of at least one of the touched positions, the control unit changes a status value associated with the external target device based on the touched positions of the two points (A1, B1), wherein, in the case where the input display unit (320, 322) detects touches on the monitoring and controlling screen at the two points (A1, B1), the input display unit (320, 322) starts determining whether the rotating operation by the predetermined angle or more is performed or not, on the condition that a distance in a lateral direction between the two touched positions is within a predetermined first range while a distance in a longitudinal direction between the two touched positions is a predetermined second value or less, and wherein the input display unit (320, 322) is further configured to display a guide on a periphery of the object, the guide indicating a range in which the rotating operation associated with the object is enabled. a control unit configured to monitor and control at least a target device that is external to the control device; and an input display unit (320, 322) configured to display a monitoring and controlling screen extending in a longitudinal direction and a lateral direction, and to detect a touch operation performed by a user, the input display unit (320, 322) being further configured to display an object associated with the external target device; wherein when the input display unit (320, 322) determines that the user continues touching the monitoring and controlling screen at two points (A1, B1) and performs a rotating operation by a predetermined angle or more based on a relationship between touched positions of the two points (A1, B1) before and after movement of at least one of the touched positions, the control unit changes a status value associated with the external target device based on the touched positions of the two points (A1, B1), wherein, in the case where the input display unit (320, 322) detects touches on the monitoring and controlling screen at the two points (A1, B1), the input display unit (320, 322) starts determining whether the rotating operation by the predetermined angle or more is performed or not, on the condition that a distance in a lateral direction between the two touched positions is within a predetermined first range while a distance in a longitudinal direction between the two touched positions is a predetermined second value or less, and wherein the input display unit (320, 322) is further configured to display a guide on a periphery of the object, the guide indicating a range in which the rotating operation associated with the object is enabled.