Imaging positioning system and linear accelerator

The invention relates to an image positioning system and a linear accelerator system. The image positioning system comprises a scanning table, a first robot, a mechanical arm and a second robot. The first robot is connected with the scanning table, and is suitable for driving the scanning table to move. The mechanical arm is suitable for fixing a positioning unit, the positioning unit is suitable for positioning a lesion location, the positioning unit comprises at least two detectors and bulb tubes, the detectors correspond to the bulb tubes one by one, the detectors are fixed on one end of the mechanical arm, the bulb tubes are fixed on the other end of the mechanical arm, a first included angle is formed between the detectors, a first included angle is formed between the bulb tubes, a ray between the first detector and the first bulb tube and a ray between the second detector and the second bulb tube have a point of intersection, and the point of intersection is the lesion location. The second robot is connected with the mechanical arm, and is suitable for driving the mechanical arm to move. By employing the image positioning system and the linear accelerator system, the positioning precision of the lesion location can be effectively improved.