家庭规模向小型化发展是20世纪以来现代社会结构存在的一个重要特征。它服从于信息时代整个社会成员流动量增大的发展趋势,也是人们对私人空间日益重视的结果。因此,在当代城市居民中,已很难看到三代同居于一个屋檐下。家庭成员小规模化的后果就是人们对房屋需求量的迅速膨胀,? The development of family size towards miniaturization is an important feature of the existence of modern social structure since the 20th century. It is subject to the trend of increasing the flow of members of society as a whole in the information age and also the result of the increasing emphasis on private space. Therefore, it is hard to see that under the eaves of three generations living together in contemporary urban residents. The consequence of small-scale family members is the rapid expansion of housing demand.