This article discusses the rememberance-writing in Yuan and Bai's poems and separate them into two parts: the short and the long, The short usually are written by accident, poet was moved because of some occasional incident (it can be a voice, a blow of wind, a scenery), those things made poet recall something alike or something had happened, and wrote the short poems. The long were written on purpose, and they were painstakingly arranged. Their life experience of youth, romance, the pursuing of beliefs were perfectly plotted in the rememberance-writng.