长江流域是我国建筑节能的薄弱地区。本文对长江流域建筑节能进行了大量调查实测、现场实验和计算机模拟。以所获结果为基础，分析探讨了气候特征、热环境现状、热环境标准、能耗、气象模型等建筑节能的基本问题。提出了以空调采暖为核心，建筑热工合理配合的节能方案，揭示长江流域建筑节能的良好前景。 The Yangtze River Valley is a weak area for building energy conservation in China. In this paper, a large number of surveys, field experiments and computer simulations have been carried out on building energy conservation in the Yangtze River basin. Based on the results obtained, the basic issues of building energy conservation, such as climate characteristics, thermal environment status, thermal environment standards, energy consumption, and weather models, were analyzed and discussed. An energy-saving scheme based on air-conditioning heating and reasonable cooperation with building thermal engineering was proposed to reveal the good prospects for building energy conservation in the Yangtze River basin.