Community sustainability can be achieved if the practices and methods of human interaction are in harmony with the local environment so that ideal conditions are created where there is a balance of ecological, social and spiritual aspects of culture. For this reason, up-to-date information on the condition of the community in restoring their lives after relocation and whether the practices and methods of human interaction with the environment already have been directed towards being profitable and sustainable or not need to be studied. The purpose of the research is to analyze the condition of the assets of community livelihoods before and after relocation, analyze the level of community sustainability, and develop strategies for managing community sustainability. The approach used was quantitative, with mix method. The results of the research show that: (i) The conditions of livelihood assets in natural assets and financial assets are considered to be poor because the acidic soil condition and low fertility level of the soil cause agricultural yields to be unprofitable (ii) The level of sustainability of the Siosar community has shown a good start towards sustainability, specifically the ecological aspects shows a low value in achieving sustainability compared to the other two aspects social and spiritual; (iii) The strategy for managing community sustainability is directed at developing agroforestry; giving practical education to achieve sustainability; ecotourism development, agrotourism; improving the quality of health and education and revitalizing / intensifying local culture and; counseling in managing cooperatives, home industries and trade.