Through the study of leaf area index(LAI) and yield of rice, the spatial structure of LAI and yield of rice was discussed, their semi-sphere models were developed. The results show that LAI and yield have good regionalized variable characteristics and spatial structures. Using this method could offset the shortage of using classical statistics to study the messages of plant. The correlation analysis of LAI at the period of flowering and yield of rice showed that there existed outstanding correlation, and the correlation was subject to parabola. Researches on the spatial variability and the quantification of the crop information can provide basis for the precision farming.