With the development of intelligent manufacturing, China’s manufacturing industry has generated an urgent demand for automation and information technology. It is a practical requirement for manufacturers to establish a remote debugging system with convenient operation, low initial input and low maintenance cost for factory equipment. We developed a lowcost remote debugging system, which could quickly build a dedicated channel from the factory to the maintenance center for remote debugging. The system could be widely applied to remote maintenance of motor production line. The system architecture was introduced, and the development key points of the core devices were described in detail. Finally, the practical applications of the system were demonstrated.