3D　laser　cutting　is　used　in　automobile　and　aerospace　industry.　In　3D　laser　cutting　it　is　inevitable　for　laser　head　to　move　up　and　down,　keeping　the　laser　head　vertical　to　the　surface　of　workpiece.　The　orientation　of　laser　head　influences　cutting　result.　In　order　to　quantitatively　analyse　the　relationship　between　cutting　results　and　cutting　parameters,　the　10　marks　quality-evaluation　system　of　cutting　result　and　ANN　(artificial　neural　network)　have　been　setup.　The　knowledge　can　be　introduced　by　ANN.　These　knowledges　are　used　to　guide　actual　cutting　to　realize　intelligent　laser　processing.