As a typical artificial landscape, the spatial structure of city is the type of high collective landscape and the function of city appears as the diversities of culture, high capability and high energy flow. Landscape ecology on city includes urban spatial structure and ecological process, urban landscape scene and urban ecological construction and urban landscape planning. The most direct application of landscape ecology on city is landscape planning. This paper, firstly, discusses on the valuations of urban landscape quality and value which include the valuation of landscape aesthetics and the capability of landscape vision. The topic of this paper is urban spatial structure and the principles on landscape planning, which involves urban spatial patterns, the corridor influence of urban spatial extension and the analysis on the spatial structure of urban greenbelt system. Based on the cases of greenbelt systems in Shanghai and Guangzhou, the authors analyze on the landscape change of the ecotone landscape between urban and rural. At the same time, the characteristics of the processes of urbanization are described by urban landscape patterns and its dynamics according to the typical researches in Shanghai and Shenyang.