From 13 to 16 August 2018, Typhoon YAGI and its residual low-pressure circulation affected Shandong, causing regional heavy rainfall or torrential rainfall. Using conventional meteorological data, data from automatic weather stations, weather radar, and meteorological satellite, and numerical weather forecasting products, the process of Typhoon YAGI is analyzed and the characteristics of its track are summarized. YAGI has a special track with a sudden track change. The outline of forecasting YAGI's track and some indicative indexes are obtained by carefully analyzing meteorological data. It is an important precondition for forecasting typhoon track to analyze general circulation situation. The significant enhancement of continental high pressure acts as a signal of circulation pattern adjustment, which is a key factor to predict YAGI's track. The tropospheric temperature ridge line ahead of the typhoon and the axis of positive vorticity at 500 hPa have good indications for typhoon track. The analysis results can provide reference for improving the accuracy of forecasting typhoon track in Shandong.