The present study investigates the prediction of the population of Taiwan area. It contents the theoretical deducation of the models and comparion of the results of the prediction. Among environmental indices, the variation of population indicates the change of social environment and economical environment well. Thus, this study aims at the predication of population. In the prediction of the population of Taiwan area, the regression method has best accuracy, then the prediction based on the mathematical method, and the other methods have no robust.