1, memory is only a unique human and historical feature in the development of the city itself, including architecture, landscape, historical sites and so on. 2. It has a unique regional temperament and humanistic atmosphere, which mainly refers to the landscape and unique humanistic atmosphere symbolizing the appearance of the city formed by urban development; Precious historical blocks mainly refer to some historical blocks gradually formed in the process of urban development, such as embassy blocks and modern streets. 3. The biggest function of city memory is to show the characteristics of the city, make the city full of cultural connotation and make people full of hope for life. 4. "Irresistible catastrophic change" refers to the destruction of the city by unpredictable natural disasters or wars; "Who wants his city to be an amnesiac" means that no one wants to live in a tall building without cultural connotation and historical carrier, and people are more willing to feel the unique humanistic and historical charm of the city. In my opinion, in order to preserve the memory of the city, we should first raise residents' awareness of protection, instead of destroying historical buildings and blocks for economic benefits. Secondly, we should respect the development process of the city and avoid damaging the unique image characteristics of the city because of its over-modernization development.