Nowadays, CO2 reduction and further decarbonization are very strongly demanded all over the world. This study aims to transform the conventional system composed of a simple combination of incineration and heat recovery into the system based on a new technological system composed of gasification and effective use of recovered substances. There are two subjects: the production of synthetic gas consisting of H2 and CO, and the efficiency of H2 recovery when focusing on H2 as a future energy source. It is a realistic measure to use biomass waste as a raw material. This time, the experimental results on the effects of gasification and catalyst reforming technology when targeting materials containing plastic as well as woody biomass are shown and discussed. At the same time, the production and suppression of tar, which is a by-product and easily causes system failure are also shown. The results obtained from a small-scale laboratory tests showed that the composition of hydrogen in the synthetic gas after catalytic reforming was up to a little less than 60 vol% (under conditions excluding N2) under appropriate ER: Equivalent ratio on O2 and S/C: Steam/Carbon ratio conditions. The catalyst used was a silica carrier-supported nickel catalyst rich in mesopores, and it was clarified that the catalyst also works effectively for tar reduction. In the future, we would like to clarify the technical conditions and requirements suitable for the purpose of use of the products from the gasification process, and contribute to the acceleration of the realization of a carbon-free society.