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This paper mainly introduces the design and realization of the color identification and color recognition device. The article first introduces color identification technology background, trends and applications Followed by discussion of the three primary colors, and H of the basic theory of threshold Introduce the identification methods of the color this basis color recognition device design. Introduced the application TCS230 color sensor circuit and AT89C51 which is used in the design and the circuit based on TCS230 and AT89C51. In this paper, color recognition module and digital display unit are described. The article introduces hardware and software design process detailed.The stability of the device using white light source for irradiation, form color filter light through the replacement of different colors, pulse forming by the color sensor. Single-chip pulse signal acquisition, processing, identification, color, last four digits the color information display.