HY-BMS is an intelligent buoy System that is suitable  for hydrological, environmental and meteorological  monitoring. It uses buoys as sensor carriers that are  capable of configurating monitoring devices such as  GNSS, ADCP, attitude sensors, and meteorological  sensors to continuously obtain data like the position, attitude, water depth, flow velocity, direction,  and temperature near the buoy. Through the RTU communication module, the observed data is transmitted in real time to the server  for storage and reflects the hydrological and meteorological changes in the nearshore sea area in real  time and continuously. Observation data can provide data support for subsequent big data analysis  and numerical simulation of the marine environment.