In order to solve the problems of the traditional search engines in terms of accuracy, the paper puts forward the concept of vertical search engine based on ontology, and using it in the library resources. The paper firstly describes the development of vertical search engines situation, characteristics and technical principles. Then we analyze the ontology technology, advantages and in the role of vertical search engines. We propose the basic model of vertical search engines based on ontology in the library resources. And on this basis, we give the ontology-based information acquisition strategy, ontology-based information extraction strategy, ontology-based retrieval and its implementation algorithm. Finally, we utilize the ontology in the vertical search engine application, and the experimental effect is very ideal.
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