The objective of this paper is to design and implement a process about reverse engineering, which will generate smooth trajectories without using a high cost controller. Because contour of work pieces is more complex today, the trajectory planning and generation are essential in the whole process. In this paper, using Bezier curve to clarify the rough outline makes the process of reverse engineering more accurate and clearer. The pros and cons of Bezier curve and the comparison between Bezier curve and NURBS are mentioned. Additionally, we implement this system without a high level expensive controller, and to solve the complex curve problems efficiently and economically. We implement this system with Dual Drive Machine that is designed and implemented in our lab previously. Experimental results have been successfully conducted to prove the principle as proposed.