The invention provides a method for mounting a semiconductor refrigerator. The semiconductor refrigerator comprises an inner container, a shell, a back plate, a semiconductor module, a cold-end heat exchanger, an evaporator, a heat-end heat exchanger, a condenser and a heat bridge. The method for mounting the semiconductor refrigerator comprises a preassembling stage, a final assembling stage, a foaming stage and a part mounting stage; the preassembling state, the final assembling stage, the foaming stage and the part mounting stage are sequentially carried out. Due to the fact that the method for mounting the semiconductor refrigerator is provided with the preassembling staee, the final assembling stage, the foaming stage and the part mounting stage, the semiconductor refrigerator can be formed. The mounting efficiency of the semiconductor refrigerator and the heat exchange efficiency of the semiconductor refrigerator after mounted can be obviously improved.