Under the current situation of information，data and intelligent management，the existing monitoring mode which only judges and disposes through the text alarm information is not suitable for the new development needs，which shows the disadvantages of low management efficiency and low intelligence． In order to promote the reform and development of substation monitoring business，a monitoring alarm information display system based on Unity3d is designed． The system visualizes the relationship between substation equipment posture，equipment and alarm signal and the data flow through Unity3d platform based on 3D mode，which is not only helpful for the monitor to master the actual situation on site，but also to guide the operation and maintenance，and will has a profound impact on industry development．