Abstract: A multifunctional energy saving and carbon reduction apparatus includes an outer pipe and a foam layer. The outer pipe includes an inlet and an outlet, and each of the inlet and outlet is connected to an outer-pipe connector, inside the outer pipe is formed an inner space in communication with the inlet and the outlet. The foam layer is stuffed in the inner space and formed with a plurality of orifices and contains small amount of natural radiation ore powder. The multifunctional energy saving and carbon reduction apparatus allows the reactants, such as liquid fuel and oxidizer or gaseous fuel and oxidizer, to come into direct contact with the radiation element layer, when the reactants flow through the energy saving and carbon reduction apparatus, so as to enhance combustion efficiency.