Buddhism of China mainland and Taiwan Believe in Buddha .The general Buddhists with stem from the Chinese culture blood vessels, and now they unite in under Popular Buddhism. It's called great harmony, while great harmony is hard to avoid little difference. Discussion on the difference, especially when the difference and evolvement in practice are directed by the similar Popular Buddhism, will be propitious to the further communication between the two sides across the Taiwan Strait and Promotes mutually.This article try to do the elementary analysis to the following three aspects, that is social background, present visage, organization pattern. And it will give the prospect of the feasibility and the reality of the Superiority supplementary which the Popular Buddhism idea manifests in the practice between the two sides across the Taiwan Strait.