By studying the partial oxidation of cokeovengas (COG) and CH₄ in oxygenpermeable membrane reactor through designing experiments and test of oxygen permeation, a “reformingpermeation” model in a membrane reactor is proposed. A membrane reactor is composed of an oxygenpermeable membrane and a catalyst bed. The catalyst bed mainly realizes the pyrolysis of CH₄ and catalytic reforming, and metal particles on the membrane surface accomplishes the “adsorption—spillover—oxidation” processes of the reducing compositions in the gas to promote conduction of oxygen ion in mixed conductors.