The number of traditional transformer condition monitoring IED is more, the information interaction is complex, the device fault alarm rate is high, and system reliability is low. In view of the above problems, this paper proposes an integrated scheme of performance improvement for transformer intelligent condition monitoring. Hardware and software integration and oil chromatogram device optimization design can effectively reduce IED quantity and improve the reliability of the system. Based on the research of Xenomai real-time Linux operating system, and combined with SQLite embedded database and application of web service technology, online monitoring system for transformer of acquisition function integration, process standardization and model integration design diagnosis is realized. The design of the intelligent component integrated on-line monitoring of oil chromatogram, iron core grounding current monitoring, ultra high frequency (UHF) PD monitoring and other functions, has been used in the Chongqing Huxiao 220 kV intelligent substation, and achieved good results, which fully embodies the future of intelligent monitoring module to compact structure, communication standardization, state visualization the direction of development, with good prospects for promotion.