门牌是城市道路地名的延伸，和其它地名一样具有较强的指位性、排它性。门牌是城市发展到一定阶段的产物，伴随着城市建筑物的产生而产生，具有较强的伴生性。门牌虽小，但其密度极大，使用频率高。它与城建、规划、邮电、公安、消防、旅游、工商等社会管理及人们的日常往来有? The number plate is an extension of the names of city roads. It has strong referential and exclusive nature as other place names. The number plate is a product of the city’s development to a certain stage, which is accompanied by the production of urban buildings and has a strong associated character. Although the house number is small, its density is extremely high and its frequency of use is high. It is related to urban management, planning, post and telecommunications, public security, firefighting, tourism, industry and commerce, social management, and people’s daily contacts.