Abstract: ZWZY5 system for prescription-design is of manifeld functions,such as drawing up a prescription plan for orthogonal design test,doing orthogonal regression and optimization operations, deriving regression equations of property targets,obtaining the optimization prescription,predicting properties of welding materials,working out the nonlinear regressions containing lots of unknown numbers,and gaining dozens of welding material prescriptions of a certain known property target.The system is simple and convenient,quick and punctual for making up prescription designs.The blindness of the traditional method for prescription designs can be radically overcome. When we use it to develop the wear-resisting deposit electrode,we have got quite satisfactory result and been successful in develping "Dui 51"-the series of wear-resisting deposit electrode with fine comprehensive properties.