Eco-museums are a new kind of museums related to the protection of natural and cultural heritages in communities and they are also one of the modes being worth to be used in the development and protection of the world cultural heritage. This paper sums up the conception and connotation of eco-museums. From the demand of easing the conflict management of scenic areas, the effective way of improving the ecological environment of soil building in Yongding, the needs of promoting Hakka culture and the requirements of building a harmonious community we analyze the necessity of building eco-museum in soil building in Yongding. At the same time, based on the opportunities of application for cultural legacy, the improving the lives residents, the harmony external environment, the internal dynamics of space and the unique Hakka culture, we demonstrate the feasibility of building eco-museum about soil building in Yongding. And the connotation of eco-museums is applied in the development and planning of the tourism in soil building in Yongding based on analyzing the development ideas and focus on eco-museums, so as to discuss the theory of building an eco-museum in non-minority areas of our country.