Variety Design not only support to short down development time, and cut down development cost, but also support to response marketing rapid, is a kind of modern design theory which apply on Mass Customization. In some way, Variety Design is a kind of design that integrates standard design and modular design, and Variety Design object is high cost and universal parts that among platform. The authors discuss the modular design role and the different between integral design, promote the method and the step of modular design, so change the low cost parts design, and give an new product based on the platform. Based on this model, they not only save the cost of develop new product, but also save time, achieve advantage which Mass produce process.