Abstract: The article explores the Daoist philosophical perspectives on health and disease, systematically elaborating on how the Dao manifests in the human body and how deviation from the Dao specifically leads to illness. It points out that Daoist thought elevates health to a higher metaphysical level, considering the Dao as the origin and operational principle of all things in the universe. When inherent in the human body, it manifests as abundant vitality (Jing), the smooth flow of life energy (Qi), and the tranquil non-action of the spirit (Shen). True health is the fullness and manifestation of the Dao within the human body, transcending mere balance of Yin and Yang, and embodying a life in "union with the Dao". Disease, on the other hand, is not only due to external pathogenic factors or imbalances of Yin and Yang but fundamentally stems from a deviation from the inner Dao. This deviation manifests as excessive desires, deliberate human interference, and an outwardly scattered mind-all forms of action-oriented behavior that obstruct the flow of life. It proposes that Daoist practices such as non-action, returning to simplicity, fasting of the mind and sitting in forgetfulness should be employed as fundamental methods to restore health and reclaim the inner Dao.