As an aggregation of multiple energy structures, the virtual power plant may achieve complementary advantages among different energy sources. It effectively improves energy utilization efficiency and reduces carbon emissions. It is an important means for China to fulfil its low-carbon commitments and achieve high-quality energy utilization. Firstly, this paper proposes an interactive regulation mechanism between the source-side capacity system and the load-side energy use system. Secondly, on the basis of the source-load interaction mechanism. An integrated energy system scheduling model based on the source-load coordinated decarbonization mechanism is proposed. Finally, the feasibility and superiority of the proposed method are verified by example analysis.