The results were included capital of equipment, operational expenditure, operating revenue, which was calculated with different pilot size and return years. The IRR values increased along with reactor size increasing. The feasibility of commercialization potential of biomass-derived gas production system has been verified. Based on IRR analysis with the calculated years of 15 years, the IRR is 32.47%, which means the two-stage biohydrogen and biomethane productions system from condensed molasses can payback within 3.19 years.