In the first part of this paper, the design method and main technique data about the mooring buoy system are described in detail. This buoy system is generally available for shallow sea where the water depth is no more than 100 meters. It can still function well in weather conditions of force-7 wind, and is not damaged in force-9 wind conditions. In the second part,information about sea experiment for using the system is related.The mooring buoy system experiment was conducted in Aptil 20th-25th, 1979 and good data on current velocity was obtained by a self-printing current meter, model HLJ1-1, hanging from the buoy by a wire. Experiments made by throwing and recovering the buoy are also summarized. Finally, a comment about this buoy system is made after another experiment and suggestions for improving this buoy system are given.