Abstract: Hu Anguo was the founder of both Huxiang School of Thought and Neo Confucianism in the Southern Song Dynasty. His Neo-Confucianism theories were closely related to the real threats to the country, and his On Current Politics is also of NeoConfucianism value. Besides, he was an outstanding personage in the studies of The Spring and Autumn Annals in Song Dynasty. He organized Commentary with the principles from seven forerunners, namely, Mencius, Zhuang Zhou, Dong Zhongshu, Wang Tong, Shao Yong, Zhang Zai and Cheng Yi, and imitated the writing of Luxuriant Dew of the Spring and Autumn Annuals by Dong Zhongshu. Owing to his great influence on imperial examinations then, Commentary became the guide to imperial examinations in Song, Yuan and Ming Dynasties. He even tried to replace Tso Chuan with it, but failed due to its lack of plots and vivid description in historical and biographic literature, despite its profoundness of Neo-Confucianism.