In 2022， profound changes took place in the world military landscape. The Russia-Ukraine conflict and the situation on the Korean Peninsula have not only affected the equipment layout of hot spots and countries but also prompted countries to think deeply and make dynamic adjustments to the building of future air defense and missile capabilities. The development of major military powers such as the United States and Russia in the field of air defense and missile defense in 2022 is investigated. The trend of defense system construction and technology development is analyzed. Inspiration and suggestions for the current development status of air defense and missile defense in China are put forward to provide references for the construction of complex air and space defense operation capabilities in the future.