The in-situ marine radioactivity monitoring can be continuous, real-time and automated, compared with traditional laboratory analysis. The in-situ monitoring system of marine radioactivity based on a buoy was studied. The radioactivity measuring sensor is used to measure the radioactivity of the surrounding environment. The position of the measured environment is determined by GPS. The measured radioactivity data and position are transmitted to the shore station by beidou. After the shore station receives the data, it calculates and displays the radioactivity energy spectrum of the surrounding environment measured by the radioactive measuring sensor. A multi-packet transmission and lost data re-sending mechanism is studied to solve the problem that the amount of ocean radioactive data are large, the transmission time is long, and if the data are incomplete, it will cause parsing spectrum errors. Finally, the average receiving rate of long-term data is over 98%, and it is possible to use the in-situ marine radioactivity monitoring system to achieve accurate and reliable radioactivity monitoring by long-term laboratory tests. |