Multi-modal biometric recognition big data is a concrete practice of the integration and innovation of artificial intelligence technology，big data technology，and Internet technology. Developed countries have all carried out relevant research and applications，and its great value and significance in building international safe cities and smart cities are being highlighted. In the era of the epidemic，the international situation has become more complex，and higher requirements have been put forward for the improvement of capital city safety，information security in the “smart” era，and non-contact city management. After the outbreak of the epidemic in 2020，Beijing’s artificial intelligence-related industries are still developing against the trend. However，for the capital’s security and “smart” construction，the application of biometric big data to the capital’s government security，floating population management，and access to important venues needs to be strengthened. In the future，we can focus on strengthening the application in areas such as improving the safety factor of major diplomatic and foreign affairs activities and the infrastructure of the international exchange center，building a “Science and Technology Winter Olympics”，promoting the construction of a smart city in the capital，and building a high-quality and efficient foreign-related service system.