Space reentry is crucial to the space exploration: As the final stage of flight mission, it is responsible for the safely delivery of the vehicle and the payload (human in most cases); on the other hand, the harsh physical environment exists during the whole mission. This combination of high-risk and high accuracy brings great challenge to the solution implementation. For a typical space reentry mission, it can be characterized as three major sub-missions: ultrasonic reentry, supersonic-subsonic gliding and landing, each of which is challenging and vital to the whole mission. The challenge and the final solution to these submissions are different due to the difference of the physical condition, which determine the uniqueness of design and technique. This paper mainly discusses the available solution and the potential new techniques to a space reentry mission.