Abstract: In recent years,a series of public events have taken place in China,such as “SARS”,“bird flu” and so on.These events have covered the problems of state economic power that bring great impact to the citizen’s fundamental rights and national economic security.State economic power has different presentation and function under the conditions of emergency and routine.Under the structure of constitutionalism we will analyze and discuss the problems,such as in what scope,to what extent and in what procedure that is proper and legal for state economic power to infringe the title of the private property,how to negotiate and what responsibility it should bear in decision- making,and how to exercise it in price-fixing of public goods.

Key words: economic power, constitutionalism, public events