In the field of vehicle maintenance and manufacturing, industrial endoscopes are widely used for visual inspection of the engine interior in order to avoid the cost increase caused by the disassembly of the engine. By using the industrial endoscope, the product of the internal components of the engine can be detected efficiently and intuitively Carbon, wear, abnormal sound causes, corrosion and other failures. Industrial endoscopes have also become part of routine quality control during engine manufacturing. In the nozzle, the cylinder head and turbocharger, with the flexible probe of the industrial video endoscopy brought convenience of inspection, reflected very clearly. In the car engine cleaning, maintenance, industrial endoscope is also an essential daily tool, it has a simple, flexible, compact, portable, flexible and so on.