Abstract: According to the change of the feudal political structure and the need of the governing, the emperors of Ming Dynasty sometimes encourage "Ke Dao official" to listen to te rumors and verify the facts in order to collect material and crak down on the corruption of the high-level officials. sometimes, the rulers strictly prohibit the supervision of hearsay to exterminate the general mood of the slander and smear. Although the supervision of the hearsay caused many problems in the middle and late period of Min...