Market environment is formed by the interaction between behavioral over-information(competition over-information) and environmental over-information(demand over-information) in city management. In this environment, city brand management in the market of over-information should improve the direction, characteristic, efficiency of information as well as reduce the blindness, duplication, dull of information generation and spread.  City brand management also should improve the fitness, economic, value of information as well as reduce the wideness, superficialness, lavish of information's receive and transmit. In order to solve these problems, city decision makers should firstly change the product-driven concept to market-driven concept, consumer-demand-based decision, and citybrandposition-centered strategy.  Second, the correction of city brand position, the unique of brand temperament, and distinctive of brand style.  Third, the formation of entrepreneur spirit, the construction of entrepreneur component, and the development of component function.