Abstract: By using TCM -90 ty phoon field experiment IOP data, the motion characteristics of target typhoons FLO and ED are investigated. The diagnostic analysis and numerical experiment results show that typhoon can beregarded as a source of dynamic and ther-modynamic forcing to it senvironmental at mosphere, and the interaction betwee natyphoon and its environm entmay lead to the dispersion of kinetic energy and excite a hori-zontal Rossby -wave like wave train. The correlation analysis with the diagnostic results shows that the motion of target typhoon agrees with this wave train, and so the diagnosis of typhoon perturbation energy dispersion is meaningful for the forecasting of typhoon motion.