To design a machine tool product which meets the major functions and technical features with green features and achieves the maximum customer satisfaction under the constraint of costs and design cycle,the technology and green requirements in the machine tool product life cycle were acquired and analyzed.Based on this,product design planning model was built by using house of quality,the mapping between requirements and features was realized.The decision between qualitative and quantitative requirements,and the weights of requirements were determined by using analytic hierarchy process,the performance optimization decision model of green machine tool product was established.Furthermore,based on the proposed methods,a relevant optimization decision system was developed by using MATLAB GUI.Taking a CNC lathe as an example，the results show that the proposed method is rapid,effective and practical.