In order to deal with the threat of hypersonic target in the near space,the construction of early warning and detection system for hypersonic vehicle in the near space is explored,on the basis of analying the target radiation characteristics.The overall structure of an early warning system consisting of command and control center,information processing center and infrared and radar detectors on different platforms is designed.The working characteristics and tasks of detectors on different platforms are analyzed.The basic working process of the detection system is sorted out.Finally,the requirements and main construction directions of high-efficiency early warning system are analyzed.It is expected that the research results is of some reference value for the construction of hypersonic flight early warning system in the near space.