Zhu Xi believes that the 'emptiness' of Buddhism is nothing.But in fact, the 'emptiness' of Buddhism refers to the denial of self, and certainly the origin.From the perspective of religious practice, this 'emptiness' transcends the existence and absence of the world.What caused Zhu Xi to misunderstand the 'emptiness' of Buddhism?There are several reasons。First, the Buddhist tradition of doctrine began to decline in the middle and late Tang Dynasty.Second, when Zhu Xi understood Buddhism, he had a strong prejudice base on Confucianism.Third, Zhu Xi lacked research on Buddhism.In order to avoid misunderstanding, Buddhism itself should establish a complete scholasticism and advocate the Bodhisattva. Buddhists should also read the classics and form a right opinion.