This research proposes an offline planning system for generating scanning motion paths with given object model and multi-axis 3D scanning apparatus model before actual measurement. Firstly we describe a simulation system for collision and occlusion avoidance. And it also evaluats the measured portions of the surface. Based on this simulation system, as our initial trial, we propose a rough path planning method to increase surface coverage and reduce measuring time by iterations. This research is aminig at measurement of complicated automotive parts, such as sheet metal parts and press dies.