The invention provides an intelligent error preventing method and system used for outputting a dispatching operation ticket. ''Intelligent'' application of ticket simulation is provided, and a dispatching operation graphic intelligent ticket forming function and safe error prevention in a flow process of dispatching operation ticket flow are provided; and remote controlled safe error prevention is provided for a real-time monitoring and early warning application. ''One-button type'' intelligent ticket forming by regulation and control personnel is realized, ticket forming terms are standardized, ticket simulating time is shortened, work loads of the regulation and control personnel are lightened, and work efficiency of the regulation and control personnel is improved, thereby reducing safety risks.