In the research of navigation the mobile robot, the most important subject is how to dodge obstacles, this thesis will recommend using potential field immune network as the mobile robot avoiding moving obstacles. Because potential field immune network must be give target to calculating appeal virtual attractive force and virtual repulsive force, so target be giving by stereo vision system, then calculating relative distance and angle between the mobile robot and target, regard as target of the potential field immune network. IT can make that the mobile robot navigate.