The Authorized Economic Operator (AEO) system is designed to establish a partnership involving all related business parties of an international supply chain to achieve a supply chain system which satisfies a framework of standards for the security and convenience of global trades. The Taiwanese government started the programs about the AEO in May 2008. With the Taiwan's international freight forwarders as the research subjects, this study adopts literature discussion and the in-depth interview to explore the reasons why international freight forwarders introduced the AEO security certification, makes conclusions and offer suggestions, so as to provide some reference for the government and international supply chain operators to adopt the AEO for future decision making and for industrial operation and development.