Mr. Tang Jun-Yi（唐君毅 is an important thinker of contemporary Neo-Confucianism 當代新儒學 ））. The Gospel of Love（《 愛情之福音》 is the representative work of Mr. Tang’s love philosophy, and it is also the forerunner of modern romantic love in Confucianism. Although this book is short in length, it is quite rich in content, covering all aspects of love life. And it is different from the popular opinions in the market and academia, it does not make arguments from the perspective of action technology, biological instinct, and social operation, but focuses on the level of spiritual cultivation and metaphysical noumenon. For the love and even lust that ordinary people think is not high, give them a higher level. The far-reaching meaning enables the metamorphosis to be integrated into one. The focus of love lies in the exchange of life and spirit, expanding from the love of men and women to the love of truth, goodness, beauty, and God, and the love of father and son, brothers, rulers, ministers, and friends. All kinds of love can reflect and penetrate each other. This realm of “mutual reflection” is characteristic of Mr. Tang’s thought. This thesis takes The Gospel of Love as the object of discussion. In addition to introducing the key points of the book, it also points out the connection with pre-Qin Confucianism and the point of response to the issues of the times, showing Mr. Tang's Confucian mind and “returning to the original to open new”（「返本開新」 spirit.