Abstract: Based on the meteorological data including air temperature, relative humidity, etc, and energy consumption data simulated with Transient System (TRNSYS) from 1961 to 2019 in three typical cities (Harbin, Changchun, and Shenyang) in Northeast China, we analyzed the impact of climate change on design meteorological parameters and energy consumption in office buildings.The results showed that the values of three office-building outdoor design parameters (i.e., outdoor design temperature for heating, and outdoor design temperature for winter air-conditioning, and outdoor design temperature for summer air-conditioning) increase in Northeast China during the past 30 years (1991-2019) in comparison with years of 1961-1990.The outdoor design temperature for summer air-conditioning has a lower increase than the rest two parameters.The outdoor design temperature for heating in the three typical cities increases by 2.1 ℃, 1.7 ℃, and 0.2 ℃, respectively.During 1961-2017, the heating energy consumption of office buildings in the three cities shows a decreasing trend in winter and an increasing trend in summer, and the annual cumulative energy consumption exhibits a declining trend.The decreasing rate of annual total energy consumption in Harbin and Changchun is higher than in Shenyang, at a rate of 5.02 MJ·m^-2/10 a, 6.15 MJ·m^-2/10 a, and 1.99 MJ·m^-2/10 a, respectively.Air temperature is a major meteorological factor that affects the energy consumption in an office building in Northeast China, accounting for 95%, 96%, and 93% of the variation in winter heating energy consumption and 72%, 71%, and 72% of the variation in summer cooling energy consumption at three cities, respectively.With a 1 ℃ increase in temperature in the three cities, winter heating energy consumption will decrease 20.6 MJ·m^-2, 21 MJ·m^-2, and 18.9 MJ·m^-2, summer cooling energy consumption will increase 15.1 MJ·m^-2, 16.1 MJ·m^-2, and 18.8 MJ·m^-2, and the annual cumulative energy consumption will decrease 5.5 MJ·m^-2, 4.9 MJ·m^-2, and 0.1 MJ·m^-2, respectively.