The research was suggested by Sir Gilbert T. Walker and carnied out under his supervision. The object is (1) to find out the relationship between the rainfall of China of the rainy season and world weather; and (2) to find some regression for-mulae for foreshadowing China rainfall of the rainy season. Walker’s shorter method has been used for the calculation of the correlation coefficients and his critoria have been applied for testing the reliability of the coeffieients.