This paper describes the development of a 20MWth solar–wind–bio-distributed energy system and its viability of achieving biomass cascade utilization, water resource conservation, waste heat recovery, and CO2 mitigation while coproducing hydrogen, formic acid, and graphene. The proposed ubiquitous energy system model is developed by using ASPEN Plus for the operating parameter optimization and system-wide heat assessment. The system consists of (i) a biomass gasification module, (ii) a biochar utilization module, (iii) a chemical looping hydrogen generation module, (iv) an oxy-syngas combustion module, (v) a CO2 electroreduction module, and (vi) heat recovery units. Bioenergy is progressively converted through biomass gasification, chemical looping hydrogen generation, syngas combustion, and CO2 electroreduction. The role of solar energy and wind power is to induce the biomass gasification and CO2 electroreduction, respectively. The system has been proved to be water-saving with a water recycle efficiency ...