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　[1].　Our　whole　system　can　be　modeled　as　a　huge　sparse　linear　system　which　can　be　solved　very　fast　by　state-of-art　numerical　solver　[3].　©　(2011)　Trans　Tech　Publications.