Taiwan Memory (TM) is a digital library that stores digital cultural heritage (CH) resources from the National Central Library and other CH institutions in Taiwan and provides public access. In this paper, we adopt the Europeana Data Model (EDM) as the foundation and map the metadata elements of TM to EDM classes in order to improve the current metadata landscape for the system and to make the digital objects more discoverable and accessible on the Internet. Four postcards of Taiwanese aboriginal Amis are selected to demonstrate the feasibility of the proposed Taiwan Memory Conceptual Data Model in describing the TM resources. This study provides experiences of adopting EDM for an existing CH system. The processes of EDM mapping, entity enrichment, institution identification, and resource description are elaborated. It is hoped that the implication and the adoption of EDM in this study might provide invaluable information for the future development of TM or be beneficial to other CH systems that are planning to adopt EDM or other semantic data models.