Abstract: In order to develop low-temperature NH3 selective catalytic reduction ( NH3-SCR) catalystswith high activity and high resistance,the research regarding the denitration activity,sulfur and waterresistance of four main low-temperature denitration catalysts ( precious metals,molecular sieves,carbon-based materials and transition metal oxides) were introduced. In addition,the low-temperature deni-tration technologies based on in -situ diffuse reflectance infrared Fourier transform spectroscopy anddensity functional theory were introduced. It is concluded that the NH3-SCR catalysts composed of oneor more metal materials generally have good low-temperature activity,but its sulfur and water resistanceneed further improvement. The surface acidity and the number of active sites exposed are closely relatedto the sulfur and water resistance of catalysts. Denitration mechanism is helpful to analyze the influenceof SO2 and steam on the denitration process. Close-