In this study, we review the Jiuzhaigou M_S7.0 earthquake occurred on August 8, 2017, in Sichuan Province, by using four methods——the "quasi-activity in quiescence" method, the triplet method, the rhythm of multiplied nine days in different years, and the method of earthquake precursor co-migration. The results show that the prediction of the four methods are all in agreement with the practice to a certain extent.