Abstract: The intelligent transient stability analysis plays a crucial role in the online intelligent security defense of large power grid. In this paper, we propose a construction scheme of intelligent transient stability analyzer of large power grid from the perspective of information driven to improve the timeliness and intelligence level of intelligent assessment and adaptive prevention and control of large power grid transient stability situation in the operating environment. In addition, we introduce the core business algorithm and visualization display technology of power system stability situation map in detail. Finally, based on actual power grid application scenarios, relevant technology testing and analysis were carried out, the dispatching and operation personnel can quickly and accurately comprehend the power grid operation status, thereby enhancing the online security prevention and control level of large power grid transient stability. The textual work contributes to improving the timeliness, flexibility and intelligent level of intelligent assessment in power grid stability situation and security prevention and control. It plays a positive role in promoting the exploration and application of artificial intelligence technology in power grid regulation scenarios.