The present invention relates to a turning method for preventing stranding of a ship's automatic navigation system according to a ship's speed, and more particularly, to obtain current location information based on GPS information and to set a target navigation route by setting target location information The first step, the second step of receiving AIS information in real time to obtain depth information and weather information of the current location, based on the acquired depth information and weather information, calculating a stranded dangerous route compared to the target navigation route and avoiding this A third step of setting a turning route to A fifth step of returning to the route is included, and in the fourth step, the turning angle is actively calculated through feedback control according to the ship speed to predict the turning angle.
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