Abstract: The purpose of this work is to establish at any time i, formulas for the time and region of the next large earthquake to occur within continental China.At first, a criterion may be obtained to estimate the possibility of the occurrence of a large earthquake in this region during the coming three months after time t. If it should occur, then try to predict its time and location.These formulas are derived by using the relation between the time and region data of the earthquakes, occurred in both the whole world and continental China and by applying the Theory of Stochastic Process.