The invention belongs to the technical field of water taking water samples, and particularly relates to an intelligent water taking device suitable for an open water area and an application method ofthe intelligent water taking device. The intelligent water taking device comprises a supporting main body, and a water taking assembly and a driving assembly, wherein the water taking assembly and thedriving assembly are connected with the supporting main body; when the water taking operation is carried out, firstly, a remote control computer is used for setting a water taking point on an open water area map, and the position data of the water taking point is input; the water taking device is put into the open water area, and the water taking device automatically navigates to the water takingpoint according to a positioning instruction, and automatically dives into the designated depth to perform water taking; in the water taking process, a main board controls an air valve switch of an integrated air valve to be opened, and an air pump A conducts air extraction on a water taking air bag in a water taking pipe; the water can be sucked into the water taking pipe according to the pressure balance principle; and meanwhile, a check valve 2121 is arranged in the water taking pipe head to prevent water from flowing back. After the water taking is completed, the water taking device automatically returns.