介绍了大型轧钢厂高速线材轧机齿轮箱在线远程监测诊断网络系统. 能区分齿轮箱中轴 承、齿轮、轴系三类零件各自的故障特征信号,同时研究冲击振动信号在齿轮箱故障诊断中的特殊作用和意义。系统中应用计算机网络, 采用远程通信技术,应用WINNT 4.0SERVER/WINDOWS2000SERVER 系统构建RAS(远程访问服务)系统,支持远程访问,这为诊断专家共享提供了一个实用的工具,实现了现场设备大范围的异地诊断技术.为现场设备的安全可靠运行提供了保障. 关键词: 网络; 数据采集; 远程诊断. Abstract: An online remote inspect and diagnosis internet system used in the high-speed wire rolling mill gearbox of large-scale steel factory has been introduced in this article. This system can discern the characteristic signal of their respective malfunctions of these three parts: bearing, gear wheel and shafting in the gear case. Besides this, we have studied the special function and significance of impulse vibration signal in the gear case’s malfunction diagnose. Computer network and remote communication technology are used in the system. RAS (remote accessing service ) system is built by the WINNT4.0 SERVER/WINDOWS2000 SERVER to support the remote accessing. This provide a real and share tool for the diagnose expert and realize the large-scale strange land’s diagnose technology of equipments on the spot. At the same time, the RAS offers a guarantee for the security and credibility of equipments on the spot. Keyword:network; data acquisition; remote diagnosis