Industrial endoscopes can replace the human eye to enter the space that cannot be directly observed. It is usually used to detect the defects and status of workpieces in the production process and assist production personnel in quality management.

In the maintenance work of railway vehicles, the main applications of industrial endoscopes include gearboxes, hollow horizontal axles, motors, bogie side frames, bolsters and shock absorber springs, and inspection of air conditioning and ventilation systems.