It retrospects the history and current situation of human design activities, and regards use, imitation, and creation as the basic process of design development. It takes the externalization of life ideal and meaningful form as the core of design beauty. It takes traditional formal beauty law in design and modern sciences influence to formal beauty as a key link in learning design. It borrows the classification knowledge in aesthetic theory into design and classifies possible aesthetic effect of design. For a better pertinence, the book combines with design practice and arranges design cases in the fields like industrial products, building and the environment, and visual communication to return theory to practice. Of course, design cannot leave cultural expression and the book will put cultural background as the foundation of various product designs.