According to the hierachical tree-architecture, the web-based four-layer fault management system is designed and partly implemented. There is a data collection subsystem based on domain management agent, which isolates applications from managed device. 利用分层树状体系结构的思想,设计并部分实现了基于Web的四层故障管理系统:利用域管理代理进行数据采集,隔离高层应用与被管设备;