We present a system to remove noise or smooth three dimensional (3D) virtual mechanical equipment models. Our system works not in well-known Euclidean space, but in Laplacian space [1, 2]. We transform the model from its global representation into the local representation. Then we manipulate the local property with the Laplacian Coordinates . Our whole system can be modeled as a huge sparse linear system which can be solved very fast by state-of-art numerical solver .