Abstract: Through appropriate mathematical processing, the author obtained the formula for calculating the specific surface area of porous materials based on the octahedral structure model. This paper looks into the specific surface area of some ceramic foam products in practice, so as to carry out a series of theoretical applications to verify the calculation formula. Not only ceramic foam products with various material species, but also those with different structures, were investigated correspondingly. The results show this characterizing relation can well calculate not only the specific surface area of ceramic foams with different material species, but also that with various structures. This reveals the formula has a good practical ability to calculate the specific surface area of ceramic foams, and proves the characterizing relation has a good practical ability to calculate the specific surface area of all porous materials, considering the good verification result to the metal foam.