Abstract: The effect of microclimate to the greenness keeping of vegetable was investigated. The results show that microclimate conditions such as temperature, relative humidity and light intensity affect the greenness keeping of vegetable very significantly, the lower temperature and light intensity, higher relative humidity may prolong the senescence and decompose of vegetable, prolong the days of keeping greenness of vegetable, and decrease the plant diseases and insect pests. The paper has also proposed several appropriate combinations of the microclimate factors to the practical application of the greenness keeping of vegetable.