Abstract: The development of geostatistical analysis and it s application in ecology is reviewed in the paper,following with the possibility analysis of spatial pattern in freshwater ecosystem.As a preliminary study,this paper makes use of geostatistical method to analyze horizontal two dimension s patial pattern of concentration field of algea chlorophyll-a in Meiziya Reservo ir,by which we can determine the variation over all study range(isotropic) and i n different direction(anisotropic).