A composition control device comprising: a control unit configured to acquire composition designation operation information designating a composition of an imaging device and including information of a designated position on a screen that displays a captured image of the imaging device, and control an imaging direction of the imaging device to adjust the composition of the imaging device on a basis of subject information corresponding to the designated position of the composition designation operation information; wherein in a case where the subject information indicates a detected subject detected from the captured image, the control unit: controls the imaging direction in such a manner as to track the detected subject, controls the imaging direction by controlling a platform device to which the imaging device is attached, and controls the platform device using a parameter corresponding to a type of the detected subject as a parameter related to the tracking, wherein the platform device is capable of adjusting directions of the imaging device in a pan direction and a tilt direction, and the control unit uses the parameter corresponding to the type of the detected subject for each of control in the pan direction and control in the tilt direction of the platform device, and the control unit performs tracking control in one of a first tracking mode in which the parameter having high tracking responsiveness in the pan direction and the tilt direction is used, a second tracking mode in which the parameter having low tracking responsiveness in the pan direction and the tilt direction is used, and a third tracking mode in which the parameter having low tracking responsiveness in one of the pan direction and the tilt direction and having high tracking responsiveness in the other of the pan direction and the tilt direction is used according to the type of the detected subject; and wherein in a case where the subject information does not indicate the detected subject, the control unit does not perform control for tracking the subject at the designated position. a control unit configured to acquire composition designation operation information designating a composition of an imaging device and including information of a designated position on a screen that displays a captured image of the imaging device, and control an imaging direction of the imaging device to adjust the composition of the imaging device on a basis of subject information corresponding to the designated position of the composition designation operation information; wherein in a case where the subject information indicates a detected subject detected from the captured image, the control unit: controls the imaging direction in such a manner as to track the detected subject, controls the imaging direction by controlling a platform device to which the imaging device is attached, and controls the platform device using a parameter corresponding to a type of the detected subject as a parameter related to the tracking, wherein the platform device is capable of adjusting directions of the imaging device in a pan direction and a tilt direction, and the control unit uses the parameter corresponding to the type of the detected subject for each of control in the pan direction and control in the tilt direction of the platform device, and the control unit performs tracking control in one of a first tracking mode in which the parameter having high tracking responsiveness in the pan direction and the tilt direction is used, a second tracking mode in which the parameter having low tracking responsiveness in the pan direction and the tilt direction is used, and a third tracking mode in which the parameter having low tracking responsiveness in one of the pan direction and the tilt direction and having high tracking responsiveness in the other of the pan direction and the tilt direction is used according to the type of the detected subject; and wherein in a case where the subject information does not indicate the detected subject, the control unit does not perform control for tracking the subject at the designated position. controls the imaging direction in such a manner as to track the detected subject, controls the imaging direction by controlling a platform device to which the imaging device is attached, and controls the platform device using a parameter corresponding to a type of the detected subject as a parameter related to the tracking, wherein the platform device is capable of adjusting directions of the imaging device in a pan direction and a tilt direction, and the control unit uses the parameter corresponding to the type of the detected subject for each of control in the pan direction and control in the tilt direction of the platform device, and the control unit performs tracking control in one of a first tracking mode in which the parameter having high tracking responsiveness in the pan direction and the tilt direction is used, a second tracking mode in which the parameter having low tracking responsiveness in the pan direction and the tilt direction is used, and a third tracking mode in which the parameter having low tracking responsiveness in one of the pan direction and the tilt direction and having high tracking responsiveness in the other of the pan direction and the tilt direction is used according to the type of the detected subject; and wherein in a case where the subject information does not indicate the detected subject, the control unit does not perform control for tracking the subject at the designated position.