ZHANG Zai, a famous philosopher and thinker in North Song Dynasty devoted his life to reading and thinking. He founded Guan school and formed a systematic methodology on reading. ZHANG Zai stressed that both interest and aspiration were needed in reading. One should lay a solid foundation at the beginning, read with doubt and thought, and master the knowledge through a comprehensive way. What is more, to keep a peaceful mind, discuss with friends and do things following what had been learned was of great importance. It is of great significance to treat the orthodoxy limitation of ZHANG Zai's classics reading correctly and absorb his spirit of profound thinking and practical application.