While the rise of scientism in modern era has been widely considered a threat to humanism, it provides an opportunity for academia to reconsider the role played by Huayan thought in dealing with such humanist crisis. As the Avataṃsaka Sūtra suggests, the realm of Buddha is dignified and holy. Therefore, the perspective of Buddha is also always pure. Viewing from this perspective, sentient beings are all potentially great and none of them should be denied. If the realm of Buddha as argued in the Avataṃsaka Sūtra is expressed in a literary style, the thought of Huayan School helps explain why such a realm is theoretically possible based on philosophical arguments. The article introduces the basic idea of the realm and the theories behind, and considers them a remarkable response to the threat raised by scientism to humanism nowadays.