Nuclear power station electronic document retrieval method and device

The invention belongs to the technical field of nuclear power, and particularly relates to a nuclear power station electronic document retrieval method and device. According to the nuclear power station electronic document retrieval method disclosed by the invention, association retrieval is performed through the topological structure chart, construction, manufacturing, debugging and maintenance documents which exist historically can be associated with the topological structure chart of the system, and after a user inputs the retrieval keyword, the historical document associated with the retrieval keyword can be determined according to the association graph, so that the retrieval efficiency is improved. The historical documents associated with the retrieval keywords are sequentially arranged according to the descending order of the relevancy to form a retrieval result, so that the historical documents of the nuclear power equipment from manufacturing to installation, debugging and maintenance stages can be mo