Automatic construction method and system of domain ontology

The invention discloses an automatic construction method and system for a domain ontology, and the method comprises the following steps: collecting domain text data from a plurality of data sources, and carrying out the preprocessing of the domain text data; performing knowledge extraction and representation on the preprocessed data, including extracting entities, relationships and attributes from field text data, and establishing a knowledge representation model; according to the sources and quality of the knowledge, each piece of knowledge is endowed with a weight, the knowledge of different sources is fused, and a knowledge base is established; the ontology modeling is based on the integrated knowledge base, and a domain ontology is constructed by using an ontology modeling tool; reasoning and deducing are carried out by utilizing an ontology reasoning engine, and in the reasoning process, the membership degree of the fuzzy relation between the entities is calculated according to the membership degree func