Camera Lucida: Reflections on Photography is a classic book exploring the nature of photography by Roland Barthes. In it, Barthes used his "Casual Phenomenology" to find individualized reading and emotional experience interacting with photos, and then discussed the binary coexistence of "Studium" and "Punctum." On this basis, he followed the main axis with his subjective experience, eloquently and keenly discovered that the essence of photography is "that-has-been," indicating that photography reveals the continuity of culture, the cycle of life and death, experience and emotion, and finally glimpsed the eternal realm of life and love in the nature of photography by "dedicating oneself." Compared with Benjamin’s focus on the ability of photography to permeate social and physical conditions, Barthes proposed a new possibility of "how to discuss photography," providing us with unique insights and valuable experiences about photography, ensuring Camera Lucida’s value.