Provided are an apparatus and method for adding a variety of concepts to a default model by combining a linked model with the default model and linked data that is to be matched with the linked model. The apparatus may generate first relationship information about a relationship between a concept included in the default model and a concept included in the linked model and second relationship information about a relationship between a concept included in the linked model and a concept included in the linked data. The apparatus may combine the default model, the linked model, and the linked data, based on the first and second relationship information.