Abstract: As living standards improve, people also have a new request on the vegetable quality, however, due to the development of vegetable industry chain is not balanced, being stored link is easy to appear problem, the design of the vegetable constant temperature storage microcomputer monitoring system, uses the STC89C52 single-chip microcomputer as the master control chip, DS18B20 temperature sensor, the temperature of the collected information, after analysis and processing, it is displayed on the LCD. The SCM connects to the upper computer through RS232 serial port for communication, and the corresponding alarm and temperature control measures are executed.