Power generating system utilizing internal and external environmental temperature difference of building

The invention discloses a power generating system utilizing the internal and external environmental temperature difference of a building and belongs to the technical fields of thermal energy utilization and energy conservation. A heat pipe heat exchanger is installed outside a building, a semiconductor temperature difference power generating module is installed inside the building, a heat conduction device is fixed together with a radiating surface of the semiconductor temperature difference power generating module together to form a semiconductor thermoelectric cell, and the output of the semiconductor thermoelectric cell and a booster regulator are connected with a storage battery and household electric equipment. The power generating system utilizes temperature difference between the residential building and the external environment for driving the semiconductor thermoelectric cell to generate power, and is widely used in the household electric equipment as an auxiliary power supply. The power generating system has the advantages of being free from mechanical movement, noise-free, pollution-free, non-wear, long in service life and the like, thus having important practical significance in the new energy development.