Automation control is a new technology developed from a combination of mechanical, electrical, electronic and information. In Taiwan, regardless of the traditional manufacturing industries or the emerging high-technology industries, warehouses, equipments, production equipments required in the manufacturing aspects of value chain business are with the automation applications. However, in the industry, along with the internationalization and liberalization of the economy and the domestic manufacturing industry accelerating towards high value-added development, traditional distributors face considerable threats because of rapid development effect of the standardization of industrial products and more transparency of business information. The treats are: upstream supply sources are in the control of handful large domestic and foreign factories; the distributors are not unique to the downstream customers. Targeting at the hardship faced by the automated control equipment distributors, this study shall explore, from all angles of supply chain, ways in enhancing the operational performance of the automated control equipment distributors. To explore how the automated control equipment distributors, in the face of such severe competitive, use supply chain management to maintain the supply chain marketing order, establish partnership between the supply chain members, further understand that under this marketing order, how the operational performance of the automated control equipment distributors is improved. Through the interview records of the case companies, supplemented by the related domestic reference, the study sums up the constructive marketing order of automated control equipment and key factors of division of labor. The results of the three studies are presented as follows: 1. The information technology and communications technology advancement have enabled the upstream manufacturer to replace part of the automated control equipment distributors. 2.¡§Not to trust each other¡¨ and ¡§Not in harmonic marketing order¡¨ are the main reasons of vicious price competition of the distributors. Therefore, the distributors should pay attention to ¡§Reintermediary¡¨ by enhancing the differences with the upstream manufacturers and reducing the possibility of unbalance in production order. 3. Through the customers¡¦ satisfaction and feedback, they can accumulate customer knowledge and also increase the added value of themselves.