Abstract: As the main source of urban energy consumption in the future, the user side building groups have continuously improved in their economic and low-carbon requirements of energy management. In this context, it is of great significance for the photovoltaic buildings with high proportion of photovoltaic configuration to cooperate and share with the other types of buildings. Taking the intelligent buildings with different energy consumption characteristics as the research object, this paper proposes a power carbon emission right (hereinafter referred to as "power carbon") coupling interactive sharing strategy of the intelligent buildings considering the time-sharing carbon measurement. Firstly, a trading model of intelligent building group market considering carbon emission right surplus and power supply and demand is constructed. Secondly, as the differences in the composition of generator units on the energy supply side in different periods may cause the corresponding equivalent carbon emissions on the demand side to be different, this paper constructs the time-sharing carbon measurement model of superior network power purchase and puts forward the stepped carbon reward and punishment. Then, an electricity carbon coupling sharing model of the intelligent building groups based on the improved supply-demand ratio is proposed. According to the dynamic prices generated by the supply-demand ratio, the adjustment of building energy consumption plan in the alliance is guided. Through the interaction and iteration between the building groups, the optimal sharing scheme of building groups is obtained. Finally, three types of buildings are taken as examples to verify the effectiveness of the proposed model in promoting clean energy consumption and carbon emission reduction within the alliance.