Abstract: MVC（Model/View/Controller） is a design pattern which is used widely，and ERP is a kind of large-scale，complicated enterprise information system.Grounded on the R&D experiences of writer，this paper expatiates the theory of MVC pattern and its main applications.Then it brings out an enhanced MVC pattern based on Petri-Net model，which solves the complex interaction and complex business flow of ERP system in CS（Client/Server） environments better.

摘要： MVC（模型/视图/控制器）是一种应用广泛的设计模式，ERP是一种复杂的大型企业信息系统。阐述了MVC模式的原理及其主要应用方式，提出并实现了一种基于Petri-Net的新型MVC模式，能非常好地解决CS（Client/Server）环境下ERP系统具有的复杂的交互操作以及复杂的业务流程。