In all ages, examinations is one of the methods to appraise the education’s achievements, and also the main path to choose the talented and righteous people. In Le-So period, specially in Le Thanh Tong dynasty (1460-1497), examinations was fulfilled its function, the way to verify the candidate’s quality before sent them to the mandarinate. But, by the time of Le-Trinh dynasty, the change in politics, economy, culture, literature and ideal influenced the examinations. Negative phenomenon appeared more and more, that made Le-Trinh dynasty’s government proposed many effective methods to solve these problems.