Abstract: In order to solve problems of high internal temperature and non-uniform，which can not meet optimal temperature for plant production，a variable frequency air conditioning system of container plant factory was designed.Through the statistical arrangement of plant structure and calculation of total load，design scheme of variable frequency air conditioning system was determined.The temperature，humidity and light in and out of the factory were tested.Results showed that average temperature，humidity and illumination in the container were 26.3 ℃，44.8% and 12 082 lx，which meet design requirements of container plant factory.The design could speed up cooling speed in container and realize precise control of temperature.