The influences of different time-scale circulations on the westward-moving tropical cyclone Haitang(2005) are analyzed by filtering the synoptic-scale and low-frequency-scale circulations from FNL data. In the first stage, the anti-cyclone west to Haitang in synoptic-scale circulation and subtropical high in low-frequency scale circulation lead the cyclone to a southwestward moving, while in the beginning of second stage, the northward deflection of Haitang is inhibited by synoptic-scale circulation but co-steered by cyclone west of cyclone in QBW circulation and subtropical high in MJO circulation. In the later stage of movement, the genesis and development of wave train are resulted from the interaction between Haitang and low-frequency cyclone and lead to the propagation of tropical cyclone. It also causes the tendency of Haitang to move to the northeast. But, finally, the TC moves westward due to the northward migration of subtropical high in the MJO fields and QBW-scale cyclone.