The latest research work of La-Rh-O, Bi-Rh-O, Cu-Rh-O, Ca-Rh-O, Zn-Rh-O, Li-Rh-O were introduced, and the effects of their crystal structures, preparation methods, doped elements, on thermoelectric properties were studied. Rhodium oxide thermoelectric materials are considered as a new type of potential thermoelectric materials today.