To study the application of eclecticism in the design style of blue and white decorations in product design. Through aesthetic analysis of both splicing and mix and tolerance and discarding under eclectic product design thinking， it studied the deconstruction， reconstruction and comprehension of this traditional element combined with the development of time. It came to the conclusion that the design and application of traditional blue and white decoration gave expression to the dialectical relation of the representativeness， diversity and inheritance and innovation. This dialectical relation of the eclectic product design can avoid design′s blindness and disorder and be helpful to the innovative promotion of traditional national symbols′application in modern product design.