M odern enlerprise environment was analyzed in this paper，and the predicament of enterprises are pointed out—Meanwhile what is the way out was searched．IT strategy significance and IT planning are explained—Marketing globalization，competition intensezation，and the change from capital offence to information offence are the features of modern environment The predicamem is no management theory avaihhle，organization OUt of time and low efficiency，and BPR gives the way to go over it．IT will make great influence on it，while IT planning is the key factor for Success．A perfect outline of IT planning is given in this paper．