Now following the steps of Exploring the West and Building New and Harmony countries, it is important how to overcome these shortage, inherit excellent parts of traditional earth dwellings and improve the living standard of royal people. According to the field study on earth buildings in the south mountainous area in Shaanxi, we proved that their physical environments are favorable attaching some shortage such as low luminous intensity and poor ventilation, the authors give some suggestions to hope to guide to local people.