A camera unit which is capable of coping with both a case where it is largely displaced from a preset position and a case where it is slightly displaced from the same, and makes it possible to enhance accuracy and reliability in displacement correction. A zoom/focus control circuit and a pan/tilt control circuit drive the camera unit. A memory stores preset information indicative of a shooting position and a focal length of the camera unit. A correction image memory stores correction images shot at different focal lengths at the shooting position. An image comparison circuit compares between an image shot by the camera unit at the shooting position and the stored correction images, and calculates a displacement amount. A CPU corrects the driving amount of the pan/tilt control circuit based on the calculated displacement amount.