In this study, the methane steam reforming test bed is designed and built under the parameters of a chemically recuperated gas turbine (CRGT); relevant experimental research about fuel reforming is also conducted. Three kinds of reforming are used, including catalyst reforming, plasma reforming, and apposition synergy reforming. Methane conversion and fuel calorific value increase rate are discussed, and the performance of synergy is best. Synergy reforming is an effective measure to improve disadvantages of the plasma and catalyst reaction process. In addition, combustion characteristics are compared and analyzed using reformed gas in a diffusion flame. The flame is shortened and becomes narrow due to the inflammability of H-2, and the maximum temperature of flame drops almost 500 K because of the water steam in reformed gas. Ultralow NOx emission is calculated in a jet flame, which is the key advantage of CRGT.