An intelligent control system for micro plant factory was designed based on embedded technology, which took the STM32 microprocessor as its core control part and programmed in the μC/OS-Ⅱenvironment. Furthermore, the real-time display and accurate control of environmental factors (temperature, humidity, light, etc) in the micro plant factory were achieved by the control system. In order to control the temperature and humidity, a fuzzy control and fuzzy decoupling method for the control of the temperature and humidity was proposed which could solve the problem of long time delay and strong coupling between them. It had high practicability.