The invention provides a device capable of utilizing afterheat of a refrigerator to generate power. The device comprises the electric refrigerator. A red copper round pipe is mounted on the back of the electric refrigerator and provided with a semi-orifice, two semi-orifice plates are connected with the semi-orifice through four fixing threaded holes so that the red copper round pipe is fixed onto the back of the refrigerator, the top end of the red copper round pipe is connected with a condensing port of the electric refrigerator, and the bottom of the red copper round pipe is connected with a compressor on the electric refrigerator. A semi-conductor refrigerating sheet is attached on one side of each semi-orifice plate, radiating fins are mounted at the edges of the semi-conductor refrigerating sheet, and the semi-conductor refrigerating sheet is connected with a storage battery through a conductor wire. By the device capable of utilizing afterheat of the refrigerator to generate power, heat dissipated from the electric refrigerator can be utilized and converted into electric power, and thus resources are utilized sufficiently.