**Acknowledgements**

This chapter has been written in combination with the author's 10 years of teaching experience. I am particularly grateful to Mr. Jan Zhaoquan who wrote the book named *Industrial Design Method*, which has made the solid foundation for the design theory and practice. I thank my colleagues in Jiangxi University of Science and Technology and all my respected teachers of Shaanxi University of Science and Technology for their support and help that let me finish the work. And also, I thank my family for their support and encouragement behind my back. Thank you all. And finally, I hope this article will be beneficial for all friends who love to design.
