Of Tangible And Intangible,

The progress of urbanism is made faster and faster in China. In the explorations and reformations of cities,we confront the problems:the disappearing of cities and the cities being similar to each other. How can we construct the city's structure and the environmental space with their characters? It is the problem we must study and resolve in the architecture design and urban design.The thesis tries to analyze and study the landmark building and its expression in the image of city,to get the regularity of cognition. By the view of urban design,we want to set up a framework and get the method and principle to direct us.The landmark building organize the city space,and the image of city is a psychological scheme in the mind when people cognize the city space. The article begins with the research of history of the development of landmark building,analyzes four characters of it(the character of functions fornu culture.,time and space)in detail;and describe the expression of landmark building in the image with the other four factors of image(node,path edge district). And the skyscraper is important for the cognition of city image and landscape of city image. After that,we analyze the construction of city image with four famous cities:Paris,Peking,Shanghai and Berlin.Finally,we point out:the essence of landmark building is the image in the image of city by the substance and space,and its expression is base on a good urban design. We should design and construct it by the principles as follow:development view;suit measures to local conditions;humanism;ecologism.