Since the introduction of computer-chip technology in society, in every field in a wide range of light control systems, the microcontroller is replaced by the gear regulating the delay time of old growth rate in future in the heart of this to the MCU has several benefits: small size, light weight, a single power supply; features, low power consumption and low; and the data transfer, one finds in SCM internal, run fast, uding, high reliability, so single-chip is widely used in measurement and control system, data acquisition, instrumental, Mechatronics product, smart interface, computer communications, as well as single-chip multilevel system, article is primarily deals with a subject name is single-chip-chip, flowing water and light control, which enables we learned how to use the SCM control our lives in the application of the design of this subject at a later time, introduced me to many aspects of the topic describes in detail by the MCS-89C51 manifold programming the control circuit, it completed the single-chip flowing water and light control features, and gives specific hardware circuits and the appropriate kind of control circuit reliability, flexibility, use the wide-ranging especially suitable for medium-sized cities of traffic lights, neon lights, , it on other similar system has certain significance.