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• Integrated optimization model for biomass-based renewable hydrogen production systems is proposed. • We calculate and evaluate the biomass utilization potential of a certain area. • We made predictions through chemical reaction kinetics and thermodynamic models. • Inventory model is embedded in it to decide the optimal production and operation management. • The effectiveness of the model was tested through a mixed biomass project in Sichuan Province, China. In this study, we propose a novel optimization method for designing and operating various types of biomass-based renewable hydrogen production systems. To this end, we considered the coupling of multiple biomass hybrid utilization processes for hydrogen production. First, we calculated and evaluated the biomass utilization potential of a given area. Second, we predicted the biomass gasification products using chemical reaction kinetics and thermodynamic models. Finally, we determined the optimal annual total cost of the hydrogen production supply chain by optimizing the microscopic operation of the biomass gasification plant. Through the proposed method, it is possible to effectively conduct a comprehensive assessment of regional biomass material hydrogen production; moreover, the optimal design of the biomass hydrogen production supply chain can also be determined based on the availability of biomass and hydrogen demand. More precisely, the logistics operations under fluctuating demand conditions were realized, enabling strategic decision-making for planning a biomass hydrogen production system. To validate the model, a case study analysis of biomass hydrogen production, to be launched in Sichuan Province, China, is presented. [ABSTRACT FROM AUTHOR]