Product design expression is an essential stage in product
design process. Nowadays computer gtaphic technology has
been broadly used to express, analyze and complete product
design. Computer graphic is a common understandable
language between designer, professional and consumer. As
shown in Figure 1, using computer powerful expression
capacity to show designed product can objectively present
defferent aspects, variable colors, multiple features and forms
of designed product. To achieve all these, the relationship
between produt design and design expression should be
investigated.