Abstract:The domain-specific ontology is an important part of Knowledge engineering. Domain-specific ontology is an important technical knowledge representation, and support technology. This paper introduces the theory and method of constructing Petroleum exploration and development Domain-specific ontology, proposed a three-dimensional model of Petroleum exploration and development from the subject domain, knowledge domain, ontology domain.Based on the model developed ontology construction software to achieve management and application in Petroleum exploration and development domain.