An open power transmission and transformation equipment condition monitoring information platform is designed and realized. It organizes data in a standardized, optimizes data storage combined with relational database and real time database, and collects data of production management system, energy management system, power transformation and transmission equipment condition monitoring system, and environment monitoring system. After screening, conversion and merging, a unified data structure is formed which can be published through the standard interfaces and accessed by condition monitoring applications. New condition monitoring system can be easily joined in the platform, and the platform can provide long-term support for comprehensive analysis of condition monitoring data. There are many kinds of power transmission and transformation equipment state monitoring of advanced applications obtaining various types of data from the platform.