Each city includes memory elements. As a precious resource, the city memory exists, changes and continues in reality through visual material objects and cultural sub-consciousness. It is the basic context clue for urban people to apperceive, to experience themselves and their existent environment with the lapse and change of time. Beginning with the concept of memory, this article analyzed the relationship of time, space, human being and environment. It tried to use interdisciplinary research methods and rethink about the essence of city and architecture in the perspective of psychology and sociology, so as to explore the dee Pissues of ideology and value conception in urban design and urban conservation of history and culture.