To efficiently take in deep water with ease.

A well type pit 1 is arranged, and a water intake pipe 2 is arranged so as to communicate the bottom part to the water intake objective depth. By means of an air feeding means 3, compressed air is blown into the bottom part in the pit 1 so as to raise a water level in the pit 1, and water overflows to an overflow gutter 5 so as to be taken in. Subsequently, the water is fed to utility equipment via a water feeding pipe 6, and deep water is sucked into the pit 1 via the water intake pipe 2.