In the context of the complicated evolution of the international situation and the accelerated evolution of the world in the past century，China’s diplomacy has advanced in an all-round way. Beijing，the capital，has continuously optimized and improved its service guarantee capability，effectively played its role as an international exchange center，and adopted flexible and pragmatic scientific measures to ensure the success of diplomacy events hosted by China and provide quality services for the country’s overall diplomacy. On the premise of ensuring epidemic prevention safety，we will organize international cultural and sports activities by combining online and offline. The unparalleled Winter Olympics held successfully made Beijing the first and only “Double Olympic City” in the world. The successful hosting of China International Fair for Trade in Services has injected new vitality into the recovery and development of global service trade. There are many bright spots in promoting the function construction of international exchange centers in various districts，and foreign affairs resources have been deeply excavated and optimized. With the help of the cloud platform，online and offline foreign affairs activities were held continuously，exchanges and cooperation between sister cities were running smoothly，brand activities such as Beijing International Film Festival were held smoothly，service guarantee work was innovated and developed in terms of organization management and technology application，and the reputation of “Beijing Service” foreign affairs brand was improved.