In order to avoid the problem of high concurrent stability in the current power system, this paper proposes and constructs a cloud platform based DC bias monitoring and warning platform based on cloud platform, which is based on the neutral point of the substation. Open sharing and other functions. First, the overall architecture of the DC bias cloud platform for the SCADA and the electric power operators is proposed, and the application of the Internet cloud computing technology in the DC bias magnetic cloud platform is studied. The research results show that the DC bias magnetic cloud platform is divided into 3 levels, namely, physical monitoring layer, communication transmission layer and data computing software layer, and the developed integrated cloud application software supports browser and mobile terminal access, and it sets direct current magnetic bias monitoring, data analysis, data display, early warning forecast, data query service and so on. It can be integrated; the establishment of DC bias magnetic cloud platform greatly improves the computing, storage and sharing of massive DC data, and the level of concurrent access to the application system. The platform can provide an open, convenient and comprehensive solution for the power departments and operators concerned with the DC bias magnetically controlled power departments and operators, which is of great significance to the DC bias control of the power system.