The accuracy of metacomprehension monitoring will directly affect learners ’ self-regulated learning. Learners will use different clues to make metacomprehension judgments. The types of judgment clues are complicated, and the researchers have classified them from different ways. The quantity and quality of the clues used by learners to judge metacomprehension will affect the accuracy of their metacomprehension monitoring. The existing researches have been effective in improving the accuracy of learners ’ metacomprehension monitoring, and the following researches need to further explore means to improve the accuracy of learners ’ metacomprehension monitoring.