Abstract: In context of the construction of new towns, modern small residential houses in southern region of China have been gradually developing, however, due to the homogenization of construction technique, idle land, urbanization process and other factors, these houses lack of climatic and regional characteristics. Vietnamese small residential houses are in the similar climate region, by making full use of the building thermal climate buffer space, the new form of residential green housing space is created. Through sorting the thermal buffer spaces in Vietnamese small residential houses, its architectural physical environment characteristics and spatial adaptability were summarized. Some of diverse, rich and climate-adjustable respresentative modern residential spaces in southern region were selected as reference in the reconstruction of typical cases.