Abstract-The objective of this research is finding the way to design architectures harmonized with the environmental contexts and represented local identity. This research emphasizes cognitive analysis and contemplation of the relationships between environmental factors and their effects to local design by using matrix analysis in order to find out the solutions in sustainable design by using documentary research and a site survey. In addition, this research focus on vernacular architectures which were designed related to and with respect to their environments in various dimensions, such as natural, social, cultural, and economic. Moreover, they contain environmental friendly concepts that appear on their physical design, detail design, and layout planning. The case study site is Huai Jorakaemak (HJK) non-hunting area, Northeastern of Thailand that the one of the RAMSAR list of Wetlands International Importance and Eastern Sarus Crane reintroduction site. The output can apply these concepts into the real architectural design process, so that architects, planners, and environmentalists can create sustainable architecture and a sustainable environment for local community development.Index Terms-Architectural design, vernacular architecture, environmental contexts, local identity, landscape ecology.