The Institute of Modern History in the Academia Sinica was founded in February 1955 asan academic research institution specializing in modern history. Since its acquisition of theForeign Ministry Archives in October 1955, the Institute become an institution linked withspecial link of historical materials. With the deposition of the documents of Ministry ofEconomic Affairs in December 1966, the Institute formally set up an Archives Office, InFebruary 1988 a four-story Archival Building Completed, a fully modernized libraryestablishment for collecting archival materials was thus realized. This article briefly describes the management of archives, including acquisition,arrangement, disposition, conservation and utilization of archives at the Institute of ModernHistory.