Abstract Experiencing five-time expansions since 1967, ASEAN has become the important regional cooperative organization which has ten members now. These co-operations in the economics and politics make the ASEAN quite influential in the economic arena of the world. However, because the members have different monetary policy operation mechanisms and financial conditions, each regional cooperative organization will meet the great difficulties on how to deicide and implement their internal monetary policies. Nevertheless, the performances and effectiveness of the monetary policy operational mechanisms and financial conditions of each central bank will depend heavily on its own level of independence. Thus, when we focus on what influences would be made on the Asian economy by the development of ASEAN, we need to have a broad viewpoints on the issues about monetary policy operational mechanisms and central bank independence in each member of the ASEAN. But to our best knowledge, there are few studies on this issue, so we will give a simple summary on the monetary policyoperational mechanisms and use the three popular indices to measure the central bank independence in all members of the ASEAN. Through the discussions of this article, we will know the advantages and disadvantages of the operational mechanisms of each central bank of the ASEAN members.