A dimensional X-ray computed tomography system configured to obtain projection images by irradiating an object to be measured disposed between an X-ray source and an X-ray detector with X-rays for CT scan, and generate a three-dimensional image of the object to be measured by performing CT reconstruction on the projection images, includes a fixed table on which the object to be measured is placed, and a movable X-ray source and a movable X-ray detector that are capable of moving around the fixed table with the fixed table therebetween.