NOVELTY - The energy regeneration system comprises a heat pump (11) generating a heat source (111) that is present in thermal contact with a first working fluid and a cold source (112) that is present in thermal contact with a second working fluid, a bioreactor (12) generating a biomass fuel and a heat energy, a combustor (13) burning the biomass fuel to superheat a third working fluid, a temperature difference electricity generation device (14), a storage tank to store domestic wastewater created by the bioreactor and/or rainwater, and a solar cell.    USE - The energy regeneration system is useful for converting biomass energy into heat energy, mechanical energy and/or electrical energy.    ADVANTAGE - The energy regeneration system prevents power supply to the power requirement terminal from interruption, eliminates the requirements of petrochemical fuel or nature gas, and reduces emission of greenhouse gas.    DETAILED DESCRIPTION - The energy regeneration system comprises a heat pump (11) generating a heat source (111) that is present in thermal contact with a first working fluid and a cold source (112) that is present in thermal contact with a second working fluid, a bioreactor (12) generating a biomass fuel and a heat energy, a combustor (13) burning the biomass fuel to superheat a third working fluid, a temperature difference electricity generation device (14), a storage tank to store domestic wastewater created by the bioreactor and/or rainwater, a solar cell, a wind power generator and/or an electricity storage device, and an automatic transfer switch for selectively connecting a power requirement terminal to a power line of an electric power company or the energy regeneration system. The third working fluid is superheated and vaporized into a high temperature vapor via a flash vaporizer, and is pre-heated by the heat source and/or the bioreactor in sequence before superheated by the combustor. The temperature difference electricity generation device comprises a hot end that is present in thermal contact with the high temperature vapor, a cold end that is present in thermal contact with a heat sink so as to generate electricity, a Stirling engine and a generator. The first working fluid and the second working fluid are used to thermally regulate the bioreactor. The first working fluid is used for air-condition, bath and/or heating. The second working fluid is used for air-condition, dehumidification, refrigeration and/or cooling. The bioreactor comprises a first reactor unit and/or a second reactor unit. The first reactor unit uses animals' excrements as a reaction substrate to generate a first biomass fuel. The second reactor unit uses animal/plant materials as a reaction substrate to generate a second biomass fuel. The heat sink is ambient atmosphere and/or ground. The cold source functions as the heat sink. A part of the high temperature vapor is used for cooking. The first fluid, the second fluid, and the third fluid are water or aqueous solution. The storage tank functions as the heat sink, and is used for thermally regulating the bioreactor. The electricity storage device consists of batteries.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of an energy regeneration system.    Heat pump (11)    Bioreactor (12)    Combustor (13)    Temperature difference electricity generation device (14)    Heat source (111)    Cold source. (112)