The invention provides an industrial afterheat semiconductor temperature difference generator taking heat conducting oil as a heat conducting medium, which is characterized by installing a heat exchanger in the production process of industrial afterheat produced by enterprises, educing the industrial afterheat generated in the production process through the heat exchanger by taking the heat conducting oil as the heat conducting medium and utilizing the Bessel effect of a semiconductor material to generate electricity after the heat conducting oil which absorbs the afterheat enters the semiconductor temperature difference generator, wherein the semiconductor temperature difference generator uses the heat conducting oil as a heat source and uses cooling water as a cold source. The industrialafterheat semiconductor temperature difference generator has the advantages that the structure of the heat exchanger can be flexibly designed according to the characteristics of the afterheat in thetechnology process, the afterheat is conveniently educed, and the heat conducting oil used as the heat conducting medium also plays a heat accumulation role; and in addition, the invention overcomes the shortages of long design period, large occupying area, high investment, the great temperature fluctuation of a product carrying the afterheat, and the like of prior afterheat utilizing equipment.