The Annals of the Spring and Autumn was the origin of the Chinese historical book, and is most representative. It is said that among the Classics, it is the only one that Confucius himself wrote. For over two thousand years, many scholars has interpreted and written about it. The writing and author of the famous The Zuo Commentaries has been controversial, but it is surely related to The Annals of the Spring and Autumn. Du Yu of the Jin Dynasty wrote authoritative commentaries on both. They has been amended and criticized by many later scholars. Gu Yanwu was one of them. This essay tries to analyze and discuss the writings of Gu on The Annals of the Spring and Autumn, The Zuo Commentaries and Du Yu’s writings. It is to show, in Gus reading and re-interpretation of the Classis, what messages are to be revealed? In what way was Gu’s re-interpretation of the Classics in accordance with the hermeneutics in the West? Above all, it is to help us understand better, not only the Classics, but also Gu Yanwu himself.