Abstract: A system and method for a multi-chamber biomass reactor that includes: a reaction chamber, comprising the primary chamber for biomass processing; an outlet chamber, adjacent and connected to the reaction chamber; a biomass inlet, comprising a region for the input of biomass into the biomass reactor; a conveyor system, comprising components that actuate the biomass, and other components, through the biomass reactor from the biomass inlet through the reaction chamber, and through the outlet chamber; and a gas exchange system, that controls gas flow within the biomass reactor, comprising: at least one air vent; and an exhaust. The system functions to process biomass, whereby the system converts input biomass into energy rich products, such as coal, char, bio-fuel, fertilizer, briquettes, electricity. The system and method may further include a variable incline module, comprising actuating components that can alter the incline and/or height of the biomass reactor and/or biomass reactor components.