To provide an automatic programming equipment for YAG laser work capable of decreasing the time required for preliminary setup for welding by using stereographic image data of three-dimentional CAD.

When cutting and/or welding is executed by a laser machine 1, using working conditions of indicated cutting and working conditions of welding, a working program is formed applying a three-dimentional CAD program to design a product, and then based on the working program cutting and welding are executed. At the time of indicating welding work, a stereograph is formed applying the three-dimentional CAD, and into this stereograph welding positional and welding condition are inputted, thereby a CAM soft for YAG laser work forms the working program for welding, by which welding is executed. At the time of indicating welding work, a development view is formed applying the three-dimentional CAD, into which the cutting conditions are inputted, and the CAM software for YAM laser work forms a cutting program, by which cutting is executed.