In recent years, research on detection of space weak moving point targets in infrared image sequences under complex background has attracted much attention. This is of most significance to space surveillance systems, early warning systems and missile tracking systems. For various reasons, the detection, tracking and recognition of space-based dim point targets still face many challenges. Both instrument jitter and platform motion may cause the target positioning to deviate. Because of observation distance and space-based imaging environment, targets may be often submerged in background noise or other kinds of noise. Therefore, how to detect and identify moving targets quickly and accurately in low SNR environment and meet the indexes of detection rate and false alarm rate is the problem to be solved urgently in related fields. The research in related fields at home and abroad in recent years is classified and summarized so as to seek for new exploration and discovery on this basis.