Abstract
In a load handling system, a load handling operation is performed between a platform and the inside of a container of a container truck. A load handling device that performs the load handling operation includes a mobile robot including, on an unmanned transport vehicle, a robot with a robot arm capable of handling a load. A proper position display unit is installed outside the mobile robot and displays a proper position of the mobile robot relative to a position of the container of the truck. After aligning the mobile robot to the proper position, the mobile robot autonomously travels.