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Vacuum is a necessary dynamic resource for wind group test. As one of the wind tunnel power resources supply system, vacuum pumps have the characteristics of plentiful in number, dispersed distribution, complex structure, high integration, heavy running noise and so on. In order to meet the needs of equipment health management and maintenance decision support for vacuum pumps, the centralized monitoring and intelligent fault diagnostic system was designed and developed. The adoption of technologies of PLC isolation communication, data visualization, equipment condition monitoring and intelligent earing warning, expert system based on fault mechanism and rule reasoning, enables centralized monitoring and fault diagnosis and analysis, solves the problems of fault prediction and early warning of power resources supply equipment, the difficulty of fault location, the lack of expert knowledge base. The system has been verified to realize the fault prediction of vacuum pumps, and improve the efficiency of comprehensive monitoring and diagnosis, which is worth popularizing.