Based on the data of air temperature, latitude, longitude and elevation of 59 meteorological stations and their locations inside and outside the island county in Zhejiang province, this paper appied the theory of the multivariate linear regression to construct the mathematical model of the space distribution or the air temperature in Zhejiang ground level. Thus, the law of decrease and increase by degrees or the space distribution of the air temperature in Zhejiang ground level is obtained. On these grounds, according to the demand of the heat condition for the tea planting, we divide the Zhejiang province into five heat suitable zones for tea planting. Thus, we find out the law of the distribution of the heat suitable zone for every tea planting in Zhejiang province.