This paper presents a pneumatic design on the Intelligent Air Transfer System (IATS) which will lead to realistic and extended applications as well as the technical means to transfer cask system over 30 tons in the fusion nuclear environment. Air bearings, as the core of the pneumatic drive, could be adaptively controlled for attitudes of the IATS with different loads. Moreover, pneumatic actuators are used for steering while wheels could be pushed down on the ground with appropriate adhesion and rotated by a fine angle. Besides, simulations are carried out for air bearings and jacks by AMESim, in which the simulation results are in accordance with theoretical calculations and the preselected actuators configurations satisfy the actual requirements. The analyses show the feasibility and high-performance of the design.