Three tiers structure of sofeware which have been used in the sofeware system broadly , the first research objects , conclude the data flowing model between data tier and logistic and the data flowing model between view and logistic , then build the meta model of the two model , at last realizing the two meta model basing on using xml and software reusability , 作者通过对现在广泛应用的三层体系结构和n层体系结构的分析入手,提出数据层和逻辑之间交互的模型,逻辑层和表示层之间交互的模型,并在此模型的的基础上提出他们的元模型,利用xml技术,软件复用思想,在java环境下实现这两个元模型。