The invention relates to an air-valve structure and an inflatable seat applying the same, in particular to the air-valve structure with few parts involved and not easy to damage. The air-valve structure comprises a base body, a valve body and a floating piece, an inserting groove is formed in the base body, a magnetic piece is arranged on the inner bottom surface of the inserting groove, the valve body is arranged in the inserting groove of the base body in a locked manner, a through penetrating hole is formed in the center of the valve body, the floating piece is slidably arranged in the penetrating hole of the valve body, an air hole with an upward opening is formed in the center of the floating piece, at least one guide hole communicated with the air hole is formed in an annular abutted piece on the periphery of the floating piece, and another magnetic piece corresponding to the magnetic piece of the base body and repellent to the same is arranged on the bottom surface of the floating piece. By the aid of the design that the magnetic piece inside the base body is repellent to the magnetic piece of the floating piece in the valve body, the floating piece can generate power of closure relative to the penetrating hole of the valve body, the problem and trouble caused by using of elastic pieces or electromagnetic valves in the prior art are avoided, elastic fatigue is avoided, service life of the air-valve structure can be prolonged, and generation of pollutants can be decreased.