1. A measuring system for measuring a position of an object to be measured, the measuring system comprising: a camera for capturing the object from different points; an image processing part for calculating a plurality of measured results in relation to the position of the object based on a plurality of images captured by the camera; a comparing part for comparing the measured results with each other so as to determine whether the plurality of measured results represent the same position of the object or not; and a judging part for determining that the measured results are valid only when the plurality of measured results are determined to represent the same position of the object by the comparing part.