The embodiment of the invention discloses a biomass energy-based domestic heat comprehensive supply system and a coordination method. The system comprises a biomass sorting box, two biomass boilers, agenerator set, a biogas system, a harmless stockpiling pool and a water supply circulating system, wherein the biomass sorting box is used for sorting, drying and crushing biomass wastes in domesticwastes and conveying the biomass wastes to the biomass boilers through a pipeline; the biomass boilers use raw materials generated by the biomass sorting box for combustion to achieve heat and power generation; the generator set is connected with the biomass boilers to use production capacity of the biomass boilers; the biogas system is used for fermenting biomass wastes in the biomass sorting box; the harmless stockpiling pool and the water supply circulating system are used for processing fermentation sediment of the biogas system and combustion slag ash of the biomass boilers; and therefore, harmless treatment of residential domestic wastes and reuse of waste energy are realized, heat supply, power supply and water supply of residential floors are achieved, and pollution of the biomasswastes to the environment is effectively reduced.