In recent years, rural residences go into a period of large-scale construction. Rural residences and urban residences are quite different in Layer, construction and service time. Little existing research on rural residences construction, and more research pay attention to optimize the design of the external window energy saving and ignores improving indoor light environment, such as Chongqing area. Main factors of external window are window-wall ratio, window glass types, external shading, etc. The factors influence the lighting and air-conditioning energy consumption at different levels and the consumption between lighting and air conditioning energy are opposite. In this paper, based on the average coefficient of indoor day lighting, use DesignBuilder software establish the model of the typical rural residences and use orthogonal experiment to analyze the results. Get the result: window-wall ratio＞window glass types＞external shading. And through the lighting standard conditions get the smallest window wall ratio in different glass types and external shading condition.