<p dir="ltr">Increasing awareness of climate change, air pollution reduction, environmentally friendly, low energy consumption, ecologically friendly green building design, and proper use of energy is important for using eco-materials as thermal insulation in buildings and ensuring the stability of buildings. In this study, the possibility of using environmentally friendly and eco-Mongolian sheep's wool insulation material as insulation was determined, and the main focus was on evaluating the thermal protection of the building. There is still a lack of knowledge on the use of sheep's wool thermal insulation materials as insulation materials in buildings with various designs, so by investigating whether sheep's wool thermal insulation materials are suitable for improving the thermal protection of buildings, as part of the research work, comparing sheep's wool thermal insulation materials with other thermal insulation materials in terms of thermal technical parameters</p><p dir="ltr">Since it was friendly, eco-friendly, and had the characteristics of having a good effect on indoor air quality, it was used as a heat insulator in buildings, the heat loss of the building was evaluated, energy efficiency and green building classification were determined through research work, and a wide range of scientific experiments and research were conducted.</p>