The laser marking machine marks each camera module with a clear and readable two-dimensional code, which is passed to the next process, and is identified by the smart camera and associated with the internal system, which can effectively realize the inquiry to the production supplier and the process of the production process. The problems generated in the control are controlled. The most important thing is to retain such information after shipment, so that customers can know the details of the product, understand the production batch, production date and other important issues, but also contains the company's product information, which plays an important role in product protection and brand promotion.