A golf game method by use of an OK zone and inducement and an OK zone display device are provided to enable a user to play golf at night or in a foggy day and to reduce golf playing time by letting a golfer flying a golf ball to a position nearest to a hole cup win. An OK zone is set up by an OK concentric circle drawn based on a hole cup(5) installed on a green zone(4). The OK zone display device includes a central shaft rod(11), a rotation rod(12), a slider(14) and a display powder receiving drum(15). The central shaft rod(11) is inserted into or detached from and stands on the hole cup(5). A supporting ring(13) fixed on one end of the rotation rod(12) is inserted into the central shaft rod(11). The slider(14) is coupled with the rotation rod(12) and moves to slide. An outlet(15-1) having an opening/closing member is formed on the lower end of the display powder receiving drum(15).
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