System for identifying, correlating, searching and displaying documents based on relationship superposition and combination

The invention discloses a system for identifying, correlating, searching and displaying documents based on relationship superposition and combination, which is used for establishing a knowledge management system based on a computer system in a professional field to improve the learning efficiency and the use efficiency of professional knowledge. The technical scheme is as follows: finding a series of documents having a document logical relationship with a group of specific keywords in a large number of documents in a keyword search manner, and naming relational graphs of the specific series of documents and a group of strongly related keywords, superposing and combining the relational graphs of a plurality of documents having similar term keyword groups in the titles and mutually having the document logical relationship into a set, and naming the group of similar term keywords according to a certain logic sequence. On this basis, the relational graphs of the documents are graphically displayed in multiple angles and multiple levels based on the specific logical relationship in a manner conforming to the human brain thinking logic.