The invention relates to an immediate offshore area water-quality sampling point optimization device and an optimization method thereof. The optimization device comprises an immediate offshore area waThe invention relates to an immediate offshore area water-quality sampling point optimization device and an optimization method thereof. The optimization device comprises an immediate offshore area water-quality data collecting system for collecting immediate offshore area water-quality data and an immediate offshore area water-quality sampling and analyzing system for aggregating the water-qualitter-quality data collecting system for collecting immediate offshore area water-quality data and an immediate offshore area water-quality sampling and analyzing system for aggregating the water-quality data of sampling points based on an aggregation analysis method, and aggregating results are analyzed to confirm final sampling points. The invention can improve the representation of the sampling py data of sampling points based on an aggregation analysis method, and aggregating results are analyzed to confirm final sampling points. The invention can improve the representation of the sampling points, ensure the monitor efficiency, reduce the monitor cost, reasonably arrange the sampling points as far as possible and represent the water-quality conditions of a researched region to the maximuoints, ensure the monitor efficiency, reduce the monitor cost, reasonably arrange the sampling points as far as possible and represent the water-quality conditions of a researched region to the maximum extent under the condition of limited monitor cost.m extent under the condition of limited monitor cost.