Currently, road managers are required to maintain and renew road assets that are rapidly aging and damaged. On the other hand, due to the everincreasing road assets, social problems such as cost reduction and shortage of engineers in maintenance and renewal are occurring. In particular, the "Road Bridge Periodic Inspection Procedure" was formulated in June 2014, and the periodic inspection is based on close-up visual inspection once every five effore, which requires enormous expenses and personnel. Therefore, efficient and economical inspection by applying non-destructive inspection technology is strongly required. For this reason, NEXCO West Japan Group has developed a digital camera inspection system (hereinafter referred to as Auto-CIMA) for the purpose of enhancing the structure inspection and improving efficiency.