A strong deviation theorem of multivariate function sequences of arbitrary random variables is obtained by using moment generating functions and differentiation of measures on a net . and a strong deviation theorem of discrete information sources is obtained 本论文利用母函数和网微分法得到任意随机变量多元函数序列的强偏差定理；及一个对离散信源普遍成立的强偏差定理。
