This paper applies the method of multi-subject synthetic study for product refinement design and prototype test. Many kinds of limited conditions to product refinement design were researched. It discovered that there are lots of relationships of observation, using, sentimental exchange, research, collection with human. There are also relationships with political and social environment, economical environment, market environment, natural resource environment, technical environment, cultural environment. Product refinement design is based on human vision rule and product intrinsic special function. The paper observed the principle of vision and psychological of gestalt and Berlyne rules, limited by technical manufacture level, facing request of ergonomics and product semantics, examined by fashion symbol in business environment, needs cultural connotation to promote product value, and it needs product identity design to carry on standard operation to product system.