Concept processing method and device for vertical field

The invention provides a concept processing method and device for a vertical field. The method can comprises the following steps of judging a vertical field type to which a search sentence of a user belongs, confirming a concept expression of the search sentence, confirming position information of the concept expression in the vertical field type according to the distance between the concept expression and one or more knowledge system concept sets directed by the concept expression, and extending the concept expression of the search sentence according to the continuity of the sentence and the position information. Through applying the method and the device, the richness of searching results is improved, and the searching of relevant knowledge dimensionality can be recommended conveniently.