Abstract: In this paper, the working principle and function of the intelligent greenhouses with distributed control system were introduced. This system uses an IBM-PC as a host computer and MCS-51 single chip microcomputer as secondary computers. The design methods of system hardware and software were described. The development of the system, which is convenient to operate and high in the ratio of performance to price, provides technological measures for setting up greenhouse production bases in our country and realizing efficient production on large scale.