Abstract: Typhoon structures associated its propagation is investigated using the Florida State University Regional Model. It is found that the axially-asymmetric circulation associated typhoon propagation in a quiescent environment on a beta plane develops by extracting kinetic energy from the symmetric circulation of the typhoon,which in turn depends on the interaction among symmetric,asymmetric circulations and meridional gradient of the Earth's vorticity. The three-dimendional typhoon propagates at vertically uniform speed because the generation rate of asymmetric kinetic energy is independent of height. The radial model of asymmetric circulation is determined by the radial structure of symmetric circulation of the typhoon.