The invention relates to the technical field of ocean observation, in particular to an ocean wave observation buoy system. The ocean wave observation buoy system comprises a server and a plurality ofbuoys, wherein the buoys comprise shells, three-axis accelerometers, communication modules, memories, positioning modules, batteries and MCUs; the shells are sealed shells drifting along waves on thesea surface; the three-axis accelerometers, the communication modules, the memories, the positioning modules, the batteries and the MCUs are all installed in the shells; the tri-axial accelerometers,the communication modules, the memories and the positioning modules are all connected with the MCUs; and the communication modules establish communication connection with the server. The ocean wave observation buoy system has the real effects that a three-dimensional motion track of buoy drifting with the sea waves is obtained by combining data of the positioning modules with the three-axis accelerometers, after sufficient data is accumulated, the wave height, wave direction and wave period data in the sea area can be mastered, and the observation task is completed.