In recent years, the fields in which robots work was extended. But almost mobile robots move along the pathway for robot that is blocked off from human or other machines. To enlarge the fields for application of robots, robot must obtain the ability to move through the area that human are acting. The robot we developed is able to move through the walkway mingle with human. To do that, this robot has many kinds of sensors and operated by the algorithm for recognize the environment and obstacle avoidance. And to certify this ability, we tested this robot at our campus and attend the "TSUKUBA CHALLENGE".