Abstract: Beach monitoring is an important mean to study beach evolution. Reviewed in this paper are the current situation of beach monitoring at home and abroad and the relevant indicators used in beach monitoring. The in-situ beach monitoring system established in Beidaihe is a complete system, which has the capability to carry out surveys of sedimentary dynamic geomorphology and beach environment. Using the monitoring data, evolution and mechanism of a beach in response to the a typhoon is analyzed.