Many researches on liquid rocket engine (LRE) Control have been made to meet the needs for space flight missions，such as high propulsion performance，safety，reliability and low cost，Correspondingly，new directions and new fields of LRE control research have arisen，mainly focusing on health (condition) monitoring and intelligent control. This paper deals with the evolution of LRE intelligent control level，the frameworks of health (condition) monitoring system and intelligent control system，the failure modes，the sensor technigues and the failure detection algorithms.