Ontology Learning is a method that can be used by ontology engineers to construct ontology more easily. With the rapid development of Semantic Web and the ever increasing need for ontology, Ontology Learning has been regarded as one of the most important fields in the Semantic Web related research work. In recent years, a lot of work has been done to design appropriate methods for ontology learning all over the world. But all these methods have some common shortcomings which limit their abilities. In this paper, we first analyze the characteristics of these shortcomings and then propose our own ontology learning method based on the theory of frame semantic which can overcome the shortcomings mentioned above and facilitate the ontology learning task. The experiment results show that this method could improve the performance of the ontology learning system.