From 2007 to 2012, Highland Research and Development Institute (HRDI) has operated in 29 fields (8 provinces), providing support to 120,325 persons (Highland Research and Development Institute, 2010). Institute goal is to increase farmer’s income upon base knowledge of the royal project which is combination of technology and local knowledge, community integration and participation, environment conservation and long term living balance. HRDI is committed to the success of the Hill Tribe communities. It provides the Hill Tribes of the expansion area with a business and social strategy to encourage and strengthen sustainable development and improve the livelihoods of the Hill Tribes. This research aims to measure the success of sustainability in the highland community under the Royal Project Extended.