Channel management is the determinant factor in successfully implementing marketing mix strategy. However, the effectiveness of channel management is, in turn, influenced by the interactions among channel members and their existing power structure. This study aims to explore the power and the sources of power developed by manufacturer to exert and influence on its foreign distributors or industrial users. Some 170 sample units are systimatically selected from the Buyers' Guide of Taiwan Electric and Electronic Trade Union. Factor analysis is used to extract principal components and canonical correlation analysis and ANOVA are further used to test the hypotheses. The result indicates that the manufacturer's power and its sources of power vary with its scale and with the type of its clients.