From the perspective of Eastern philosophy, Chengde Chaoyang Cave is not only a combination of natural and cultural landscapes, but also a place that embodies the philosophical idea of "harmony between man and nature". In Eastern philosophy, especially in Taoism and Confucianism, the harmonious coexistence of man and nature is regarded as the highest state. The natural beauty of Chengde Chaoyang Cave, such as mountains, water, and caves, and the ingenious integration of artificial buildings such as temples and inscriptions show the harmonious coexistence of man and nature. This not only reflects the Taoist pursuit of "conforming to nature", but also reflects the Confucian "doctrine of the mean", that is, finding a balance between nature and humanity. From the perspective of Western philosophy, especially existentialism and phenomenology, Chengde Chaoyang Cave is a place to explore the meaning of human existence and perceive the world. Existentialism emphasizes individual freedom and choice, as well as the courage to face uncertainty and loneliness in life. In the exploration of Chengde Chaoyang Cave, every choice made by tourists, whether it is to go deep into the cave or stop to appreciate the scenery, is a process of self-discovery and self-definition. Phenomenology focuses on the direct experience and perception of individuals. Every landscape of Chengde Chaoyang Cave, whether it is the mystery of the cave, the magnificence of the mountains and rivers, or the traces of history, can stimulate the sensory experience of tourists and prompt them to reflect on the relationship between themselves and the world. In summary, whether from the perspective of "harmony between man and nature" in Eastern philosophy or from the perspective of existentialism and phenomenology in Western philosophy, Chengde Chaoyang Cave provides a unique philosophical thinking space, allowing tourists to explore the deep connection between themselves, nature and the universe in the interweaving of nature and humanity.