The online thin film inspection system builds on the continuous rolling mill product solutions from CBPM-KEXIN, tailored and improved specifically for the thin film printing industry. It is suitable for diaper films, breathable films for printing, coatings, optical films, functional films, barrier films, and battery separators. The system is outfitted with an ultra-high resolution line scan camera and uses self-developed digital image analysis software. It performs real-time intelligent defect detection and rejection and also offers audio and visual alarm capabilities. The system can be customized according to customer needs to fully meet the individual requirements of different customers. The system can effectively control product quality, saving manufacturers a significant amount of labor and production costs.