Nguyen Hong (1918-1982) was a writer who made many important contributions to modern Vietnamese literature. He is a writer of the miserables. Humanism is the dominant thought in most of his works. Even when writing about crimes, evil things, his work is always filled with love for people. 'Diary of Nguyen Hong' is precious posthumous articles that his family has collected and arranged to be published. The draft was selected and completed by his daughters, Nguyen Thi Thanh Thu and Nguyen Thi Nha Nam, to introduce to readers on the occasion of the 100th anniversary of his birth. The pages of his diary from 1941 to 1982 demonstrated the cultural life of the country during the first half of the XX century. Readers can imagine how writers have lived and worked in that era.