During the last decade, due to continuous environmental change, such as financial deficits and decreases in attendance, etc., many museums in Western countries have fallen into a state of crisis. As a result, organizational change theories have been adopted by many museums in North America. However, organizational change has often been noted to make people angry, frustrated and disappointed. In North America, museums ask outside experts, such as organizational coaches or consulting firms, to lead them to a successful change with less conflict and resistance. It seems that models for change initiation and processes are being developed for museums. Museums in Taiwan have similar pressures caused by environmental change. It is not easy for museums to make changes under the government administration system. However, restructuring the organization and downsizing have become the government policy to be implemented by all national museums. Changes may be insignificant if the restructuring and downsizing of organizations are done without a master plan developed through a serious process to identify a museum,s new roles in meeting the needs of the public. For the reasons mentioned above, there are many lessons for museums to learn when dealing with change. This paper is focused on the issues of museum organizational change. The major steps of process of organizational change in two American museums are described. It is believed that their experiences, good or bad, are valuable references for other museums.