This paper concerns the persistent anomaly of North Pacific atmospheric circulations, indicating that the genesis, development and decay of positive anomaly is in pattern closely similar to the negative, both originating from the variation in the departure situation over east Asia and the western Pacific, with regularly ranging anomaly sectors in the North Pacific and east Asia, accompanied by corresponding change in atmospheric circulations over east Asia and the whole northern hemisphere; persistent anomaly of Northern Pacific circulations has major effect on weather over China. Diagnosis and numerical studies show a very close relation between persistent summer anomaly in the North Pacific circulation and SSTA of mid and lower latitudes.