The construction of rural public cultural service is an important content under the background of rural rejuvenation. In view of the current situation of "imbalance of supply and demand" caused by long-term emphasis only on supply in rural public culture, the author collected relevant data through questionnaire survey and field interview, and then grounded theory was used to analyze the process of digitalization enabling integration of supply and demand in rural cultural service from three aspects of platform, supply side and demand side, and the integration of supply and demand with Zichuan culture cloud as example, and the mechanism of digitalization enabling the integration of supply and demand was found. It is found that "technology acceptance" is the premise and foundation of digital enabling integration of supply and demand of rural public cultural services, and the importance of "combining online and offline" in the process of rural public cultural service supply and demand is emphasized.