Abstract: Based on L9R15 climatic model, the results by the three numerical experiments show that the global precipitation, espectially Asian summer monso on counterpart is difference at different stage of ENSO events under the cold and warm interdecadal background. The different physics can be showed in potential function. Compared to that under the cold background, the anti-Walker cell is stronger in the increasing stage of ENSO with stronger Walker cell in the decreasing stage of ENSO under the warm background. It means that the effect of ENSO events on precipitation anomaly under the warm background is stronger than that under the cold background.