The present application provides an automatic analysis system and method for power dispatching pre-operation information. The method comprises a man-machine interaction module, an interaction port, arule base, a data preprocessing module and a data mining module. Users first set the system running parameters through the human-computer interaction module, and select the running information neededfor data mining. The system receives the front-end system running log from the front-end system, and the data preprocessing module preprocesses the front-end system running log, and then the data mining module selects the corresponding data category to analyze the data stored in the front-end system running log, from which the key operation information can be extracted. The application enables thedispatching master station to obtain the operation information of the power system automation equipment in a relatively short time, thereby realizing auxiliary monitoring of the power system automation equipment and multi-dimensional analysis of the operation state of the equipment.