Spark discharge has been used as a source of atmospheric non thermal plasma for methane reforming. Hollow electrode and gliding arc discharge have been used for the reforming process. Optimization and characterization of the two discharge systems have been investigated for maximum methane reforming. The two discharge systems work in two different range of methane flow rate, the first one is efficient for small flow rate (50-300 sccm), while the second one is efficient at high flow rate (100-5000 sccm). Maximum volume percentage of Hydrogen of about 83 % has been reached for the first system and maximum efficiency of the second system of about 75 gm/kWh has been reach for the second system .