As an advanced infrared detection equipment, the infrared early warning satellite (IEWS) sys-tem is an important part of the anti-missile early warning system. However, the false alarm problem of the IEWS system seriously affects the operational effectiveness of the overall system. Based on the definition and manifestation of the IEWS’s false alarm problems, the causes and classifications of these problems are analyzed. Related technologies and research directions for false alarm suppression of the IEWS system are also discussed. This research will serve as a reference for future work in related fields.