Iron ore sintering is an important pre-iron process in iron and steel manufacturing, the main source of concentrate for blast furnace ironmaking, and the forefront of the implementation of the "double carbon" strategy in the iron and steel industry. As the key parameters in the sintering process, the sintering end point, the compound moisture and the FeO content intuitively reflect the working conditions, energy consumption level and finished product quality of the whole sintering process, which are the key research objects of on-line detection in the sintering process. The research status of the detection methods of such 3 key parameters is emphatically expounded, the advantages, disadvantages and applicability of the existing detection methods are analyzed from the process mechanism and parameter characteristics, the problems faced by the detection of key parameters in the current sintering process are summarized, and the future development trend is prospected.