城市化是中国社会的必然趋势.中小城市是中国城镇体系的主体,也是吸纳城市化人口的主体.当前中国大城市的问题非常严重,形成所谓的"大城市病".而中小城市的"包袱"较小,可吸取大城市前车之鉴,是中国实现可持续城市化的希望所在.学术界和决策者对处于城镇谱系中间的中小城市关注不够.中国城市化研究及发展战略需要特别关注:如何提高城市的吸纳能力以及如何提高城市的发展与运行效率.研究以城市能量代谢过程为核心的、定量的城市空间结构、人流物流形态、社区形态等等的行为效率问题十分必要;由此建立城市效率学科,可为我国城市化发展提供更好的科技支撑.%Urbanization is the inevitable trend for China's society.Small and medium cities (SMCs) are the major part of China's urban and town system.SMCs are also the major part of absorbing urbanized population.At the present time, China's big cities face many serious problems which are called "big city diseases".Compared with big cities, small and medium cities bear a lighter burden.Small and medium cities can learn the lessons fi'om big cities and solve these problems easier in their development process; SMCs are the hope for the sustainable development of China's urbanization.To SMCs, which are in the middle spectrum of urban and town system, not enough attention is paid by academic circles and decision-makers.In the research on China's urbanization and development strategy, two questions need special concern, one is how to improve the ability of cities to absorb rural population; the other is how to raise the development and operation efficiency of cities.Quantitative research on the behavior efficiency of urban spatial structure, population & goods flow forms, community pattern,etc.with urban energy metabolism process as the core is very essential; and the discipline of urban efficiency can be constructed to provide scientific support for China's urbanization development.
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