The invention discloses a novel generating set based on a heat accumulator. The heat accumulator is combined with the thermoelectric power generation technology. The novel generating set comprises a heat exchange tube water inlet, a heat exchange tube water outlet, a heat-conducting tube, a heat-collecting plate, a heat-conducting insulator, a semiconductor thermoelectric power generation module, a cooling fin, a heat sink, a voltage stabilizer and a transformer, wherein a heat-conducting fin and the heat-collecting plate are located inside the heat accumulator; the cooling fin and the heat sink are located in a heat exchange tube; the semiconductor thermoelectric power generation module is located between the heat-collecting plate and the heat sink and embedded in the wall of the heat exchange tube; an anode, a cathode and the voltage stabilizer are connected to form a circuit by use of leads, and finally, the power is output via the transformer. The novel generating set is located at the water inlet end of the heat exchange tube inside the heat accumulator, and therefore, the cold end of the semiconductor thermoelectric power generation module can be cooled continuously and stably by use of cold water just flowing into the heat accumulator via the heat exchange tube so as to create conditions for effective working of the power generation module.