With the development of advanced manufacturing engineering, selecting supplier scientifically makes for improving competitive power. This paper is aimed to suggest a methodology leading to effective supplier management processes utilizing information obtained from the supplier selection processes. First the evaluative indicator architecture is afforded. Then, throughout normalizing the value of each indicator, the processed value can be looked as the distribution of a random variable. So the method of confirming the indicator-weight based on the theory of entropy lies in information is given. Further more, the model of supplier selection is build up. Finally, the simulative example is given. It illustrates the method avail to select the supplier to enhance the enterprise. competence.