“学书为乐”是宋代的大文学家欧阳修提出的一个崭新的书学理论。有关书法艺术的讨论在古代书论中多有涉及,古人已经充分地认识到了学书的乐趣所在。本文旨在从书法的本质出发,结合古代书论中的相关论述,从书法的抒情功能、宣教功能、欣赏功能三个方面谈谈学书的乐趣。 “Book for music ” is a brand new book theory put forward by Ouyang Xiu, a great writer in the Song Dynasty. The discussion of calligraphy art has been involved in ancient calligraphy theory. The ancients have fully realized the fun of studying calligraphy. The purpose of this paper is to discuss the book learning from the essence of calligraphy and the related discourses in ancient calligraphy, from the lyrical function, the missionary function and the appreciation function of calligraphy.