Economic competition usually takes place on levels of country,industry and enterprise.With the economic globalization,cities have been the main body of competition.In China,economic total amount and developmental rate play an important role in evaluation of urban economic activity which roots in enterprises(mostly the nongovernmental business),foreign trade and capital.The income level of local residents decides the attraction to labor force which is the endogenetic energy of economic activity.Finance and social security system are perceived as important guarantees for urban development.The level of technology and education is becoming an important source of the increase of economy. Environment which correlates the sustainable development is placed high value on as an external factor of economic development.This paper uses factor analysis method to evaluate 50 cities in China from aspects of economy and its growth,amount and income of enterprises,income of residents,finance and social security,foreign trade and capital,level of technology and education,and environment. Urban benefits and production are main factors of the economic vitality.The 50 cities are classified as five levels by scores.The most developed cities lie in the Changjiang(Yangtze) River Delta Area and Zhujiang(Pearl) River Delta.Shanghai and Shenzhen which play the important role in the areas belong to the first level.The gap between coastal cities and inland ones is still large.