The design method of building energy efficiency in severe cold zone in future warming climate conditions has great significance for the development of building energy efficiency technology in China. The formula that the heat transfer coefficient change with temperature rise was given. The effects of changes in heat transfer coefficient on building energy consumption in severe cold zone after climate warming was analyzed in Harbin combining climate simulation with dynamic energy simulation techniques. Studies have shown that as the climate warms, the heat transfer coefficient can reduce in severe cold zone between 2021-2050. Based on the principle of equal energy consumption that the heat transfer coefficient of exterior walls and windows in self- thermal insulation system is equal its suitability was demonstrated.