Abstract: Started by simple presentation of location determination techniques,physical location and geographic location as two common kinds of location description methods are discussed.Semantic location concept is introduced followed.This paper has given a correction to this concept.By analyzing the connotation and extension of every geographic location,what should be contained in location property is determined.Using hierarchy model,the relations and associations among the locations are clearly described.In order to realize formalized description of semantic location,ontology technique is used.The location ontology model realizes the knowledge description of location information and establishes an important foundation for personalized preference services in LBS.