The System is a comprehensive apparatus with combined functions of in situ reaction and infrared characterization including static and dynamic adsorption (eg. carbon monoxide, pyridine, methyl nitrite), desorption, monoxide oxidation, and so on. It can be performed at different conditions, for example, at atmospheric pressure, at high pressure, in vacuum, at high temperature and negative temperature. It is easily controllable for pressure programming and temperature programming in the range of -80 oC to 500 oC, and high vacuum up to 5*10-5 Pa. In addition, it can be optionally connected with chromatograph and mass analyzer for in-situ research on reaction mechanism and surface behavior.Main technical index:High vacuum: 5*10-6 mbar with vacuum system,Pressure: 0~5 MPa,Temperature range: -80 oC~500 oC (temperature programmed),With circulation cooling and heating system,With liquid-nitrogen cooling system,Bruker Tensor-27 infrared spectrometer with MCT detector with resolution of 1 cm-1,