Intelligent question answering system for multi-source hospital database

The invention relates to the technical field of intelligent question answering, in particular to an intelligent question answering system oriented to a multi-source hospital database, which comprises a data source fusion module used for acquiring data of a plurality of data sources, generating a plurality of target data sets and determining each keyword index set, a fuzzy word index set and a directional vector set of fuzzy words and keywords; the data set matching module is used for determining retrieval modes of question keywords, fuzzy keywords and intermediate answers according to the user questions and determining a target data set corresponding to the user answers; the intelligent question and answer module is used for determining answer keywords and answer corpora of the user and outputting a corresponding answer form according to the answer corpora and a preset output model; and the answer generation module is used for outputting user answers corresponding to the user questions. According to the metho