The regional power grid dispatching intelligent aided decision-making software covers three continuous processes， including early-warning in advance， fault diagnosis under way and restoration after the event. The weak point of power network is analysised from the three levels such as equipment states monitor， stability section monitor static security analysis and system warning， and key region power grid monitoring point can be accurately grasped to derive corresponding optimal correction strategies. The fault report is created based on breaker state change message， relay message and topological analysis based fault scope diagnostic， and the restoration strategy about outage section in urgency is created. The dispatching intelligent aided decision-making software has some important characteristics such as intelligence， practicability，imitativeness and visualization，which can effectively enhance the ability of controlling the large power grid， shorten the fault process time， and at last upgrade power dispatch from experience analytical mode to automatic intelligent mode.