Abstract: The carbon emissions of residents' water and energy use are related to their behaviour choice and technology level. The emissions also fluctuate greatly over time. Through intelligent monitoring, field research, questionnaires and other methods, a bottom-up carbon emission accounting method was developed, and its impact was assessed from the perspective of community infrastructure and residential water and energy consumption. A community in Haidian District, Beijing, was selected as a case in this study. The total carbon emission of this community was 18.2-20.8, 19.3-21.5, and 58.5-63.8 t/d in terms of CO₂ in summer, spring/autumn and winter, respectively. The average daily carbon emission of residential consumption on weekend was 1.0-1.2 times that of weekday.