In order to ensure the safe, stable and economic operation of a hydroelectric generating set, it is necessary to realize the monitoring of the generating set. By the aid of effective network source, PXI, MXI-3 and DataSocket technology, a remote monitoring system for hydroelectric generating set based on expansible client/server structural model is designed under the environment of Internet and Windows. The integral plan, software and hardware composition as well as functions of the system are described ...