This essay concerns with the life history of a character in a novel. Specifically, by exploring the course of lifetime and the sense of existence, this essay aims to interpret the experience of eros of the narrator Xiao Shao, an approximately forty year-old metropolitan male homosexual, in the Notes of a Desolate Man, with the focus on the examination of the eros relationship between Xiao Shao and three important men in his life: Yao, Jay, and Yung Jie. The unique life story of the first-person narrator Xiao Shao in the Notes of a Desolate Man begins with the death of his friend Yao and his ultimate question “what does it mean by non-existence?” It is “the non-existent” makes “the existent” begin the recall of life memory, the examination of destiny and the practice of writing. This “non-stop continuous writing” represents Xiao Shao’s “Narration of Mourning” and “Experience of Eros”. Through the close interpretation of the relationships between Xiao Shao and his friend Yao, his first love Jay, and his partner Yung Jie, the sense of existence, such as death, eros and home, in the life of the homosexuals are brought forward. And this is the interpretation of the complex meaning of “desolate man” and the theme of “notes”. Also, this is a significant dimension of the unique interpretation of “eros” by Chu Tien-Wen.