In Japan, aging of infrastructure and shortage of the labor have become social problems. It is a socially demanded, to realize efficient inspections and maintenance. In this paper, we mention on the “infra-robot evaluation project'' conducted by MLIT in 2014-2015. Then, based on its results, we consider the superiority of the robot-based inspection of the bridges, and proper procedure for practical inspection. Finally, we propose the performance evaluation method to promote the practical use.
