Based on the characteristic Of GM(1,l) modelling, the paperPresents a new method Of zero setting modelling (labeled GM(1,1) method).Whell applied to grey fore￣ing, it can decrease obserVatioll data needed forestablishing a forecasting model of n-dimenSion non-negative seqience fromn to n-1, thus enaviing the Process of Sampling and GM(1,1) tranSformationto be optimized. This method is of practical value.