According to the relevant technical standards and technical solutions, combined with years of experience in project implementation, a design solution for state monitoring system of transformation equipment is proposed in this paper. Based on the production management information system(PMS), a unified state monitoring system of transformation equipment is established of “two-level deployments, three-grade applications”. As a result, the data processing, access and control of state monitoring device of transformation equipment are standardized, and the functions for status information display, warning, analysis, diagnosis, evaluation and forecasting of transformation equipment provided, achieving real-time monitoring of significant transformation equipment status and critical operating environmental information.