本文通过对冬季北方寒冷地区居室内ＣＯ、ＣＯ２浓度的测定，论述了在门、窗紧闭和密封的情况下的室内空气质量，为制定居室空气环境质量标准提供参数．同时，利用室内外温度和供回水管表面温度的测定数据，利用相关分析方法，确定了居室外墙、窗和渗风能耗值，为建筑节能设计提供依据． In this paper, the determination of indoor CO and CO2 concentration in the cold regions of northern winter is discussed. The indoor air quality in the case of closed and sealed doors and windows is discussed, and parameters are provided for the development of air quality standards for living rooms. At the same time, using the measurement data of the indoor and outdoor temperature and the surface temperature of the supply and return pipe, the correlation analysis method was used to determine the energy value of the exterior wall, window, and seepage, which provided the basis for the energy-saving design of the building.