Abstract: In order to study the interaction between eastwards moving dipoles and typhoons, eight numerical experiments are performed with a beta-plane quasigeostrophic barotropic vorticity equstion model. Results show that the interaction can creat the transformation from the typhoon asymmetric structure with one wavenumber to that with two wavenumber, that it can decrease the rate obvioursly at which the intensity of typhoons decays, and that it can also induce the transition from typhoon normal tracks to unnormal ones, such as the abrupt nort heastward recurving or anticlockwise moving and so on.