The energy consumption status and policies and regulations for existing buildings in Xi’ an region are summarized. With the climatic characteristics in Xi’ an region, the main points and measures of energy efficiency retrofit for existing buildings were proposed, especially for ex-terior envelope, air-conditioning system, lighting system and green energy, and to provide scientific basis and technical reference of energy effi-ciency retrofit for existing buildings in Xi’ an region.%概述了西安地区既有建筑的能耗现状和相关政策法规，结合西安地区气候特点，提出了对西安地区既有建筑节能改造的要点和措施，重点分析了外围护结构、空调系统、照明系统的改造以及绿色能源的利用情况，为西安地区既有建筑节能改造提供了科学依据和技术参考。
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