The significance and current-situation of running remote maintenance are introduced. The model of maintenance service system is built on the basis of studying units. The system construction, software and hardware environment are debated. The signal monitoring software system of compressor is implemented by programming with assemble language and C language. The virtual instrument applied to on/off-line signal processing is established on the basis of Labwiew. The maintenance decision supporting system interior enterprise with TCP&UDP and the remote maintenance service system adopting B/S model are dwelled. The system is practicability testified. The goal of system developing is the integrated of all kinds of MIS.