Based on the typical weather conditions of Chongqing city, the changing of building load varying with window-wall ratio has been analyzed. Combining with the factors of lighting, beauty, and construction, and utilizing the weight method, the window一wall ratio of eastern and western within 0. 342 to 0. 352 is excellent, and within 0. 375 to 0. 385 of southern and northern is excellent. By shading experiment result, and combining with the factors of scalar lighting, beauty, and construc- lion, the width of shading device within 0. 6 to 0. 8 meter is excellent.