A position detecting system having a predicting unit for calculating a moving amount by which a detected object is predicted to move between a first time and a second time after a predetermined time from the first time, and for predicting at least one of a position and a direction of the detected object at the second time, and a control unit for controlling a position detecting unit based on the at least one of the position and the direction of the detected object at the second time predicted by the predicting unit.
