Abstract: The Space-Based Infrared System (SBIRS) is a follow-up new missile early warning satellite system designed and deployed by the US Air Force to replace the Defense Support Program (DSP) early warning satellite. It is used to support fields such as missile early warning, missile defense, and battlefield awareness. It is an important part of the US strategic, tactical operations, and defense system, and plays a key role in national defense and military affairs. According to public information and based on the analysis of the mission, technical specifications, general capabilities of the SBIRS GEO-3 satellite, this paper analyzes and summarizes the configuration design, characteristics, and new technological applications of GEO-3 satellite, with an expectation to provide enlightenment for the design of high orbit remote sensing satellites in China.