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The syngas contaminates H2S and NH3 in IGCC were caused the corrosion of the manufacture and acid rain in atmosphere by converting to SOx and NOx in gas turbine[1].To use IGCC technology,H2S and NH3 gases must be removed.In the commercial process,H2S and NH3 removal processes had been worked by different removal reaction mechanisms like H2S absorption and NH3 decomposition,respectively.Those processes are inefficient,but if their processes combine to simultaneously remove H2S and NH3 gases,the process and energy efficiency will be increased and the initial capital for IGCC process will be decreased[2-3].To simultaneously remove H2S by absorption and NH3 by decomposition reaction from hot coal-gases,the molybdenum and nickel based catal-sorbents were prepared by impregnation method with various supports such as Al2O3(MNAI 20),SiO2(MNSI20),ZrO2(MNZI 20),TiO2(MNT I 20).Their simultaneous removal efficiency were tested in fixed-bed reactor at 650oC and defined to NH3 decomposition breakthrough point time over H2S absorption breakthrough point time.The H2S absorption and NH3 decomposition breakthrough point time of MNA20I catal-sorbent were 165 min and 155min,respectively,and the simultaneous removal efficiency was about 94%,while those of the other catal-sorbents were below 60%.The simultaneous removal efficiency of the MNA20I catal-sorbent was excellent,which could be explained to the crystal structure effect and discussed by XRD,FT-IR,XPS and SEM.