Automatic marking detection system and method

The invention discloses an automatic marking detection system. The system comprises a rack, a transmission system, a control terminal, a linear guide rail, a three-point marking system and double side detection systems; the transmission system comprises a left transmission system body and a right transmission system body which are mirror images of each other and in linear arrangement, and the linear guide rail is parallel to the transmission system in direction; the double side detection systems are mounted on the left transmission system body and the right transmission system body respectively, the detection system at each side comprises a shooting device, a support and a stand, each shooting device is mounted on the corresponding support, each support is mounted on the corresponding stand through a pin shaft, and each support can rotate around the corresponding pin shaft position; the bottom of each stand is connected with the linear guide rail and the transmission system at the same side; the three-point m