Abstract:There is very little quantitative analysis of the knowledge intensity in the existing literature, in this paper, the principle and method of knowledge intensity is characterized by knowledge quantity in the commodities are presented. The method of measuring knowledge intensity in commodities is illustrated by case study, calculate the knowledge intensity and scale conversion of the two services of car engine repair and bicycle maintenance, if the knowledge intensity of the former is 100%, the latter is only 4.07%; so that the knowledge intensity is comparable in quantity, a new approach is provided for the measurement of knowledge intensity of commodities and businesses.