A high-temperature plasma torch (a so-called plasmatron) was designed for a hydrogen production reformer. Experiments were carried out to determine the optimal operating conditions producing the maximum amount of hydrogen. The maximum values of the H2, CO, H2 yield and the energy conversion efficiency were 30.9, 20.2, 97.7, and 40.5 %, respectively. Parametric studies were performed regarding the effects of vapor, carbon dioxide, and catalyst addition in the reactor, respectively. In the case of vapor reforming, H2 was mostly unchanged with an average value of 29.2 %. However, CO was reduced as 6.6∼8.6 %, while CO2 was increased with the increase of the vapor flow rate. For carbon dioxide reforming, H2 was decreased with the increase of the CO2 flow rate, but CO and CO2 gradually increased. For reforming with the nickel catalyst, the amount of H2 produced was slightly larger than without catalyst addition in the reactor, while the CO and CO2 contents were lower, due to the increase of residence time and adsorption.