The invention relates to a projection type billiard system gesture / billiard rod control system and an implement method of the projection type billiard system gesture / billiard rod control system. The system comprises an image collecting device, a projection device and a computer, the signal output end of the image collecting device is connected to the input end of the computer, the input end of the projection device is connected with the output end of the computer and controlled by the computer, and a hollow billiard lighting lamp and an infrared light supplementation lamp are further arranged. The implement method includes the steps that the computer controls the projection device to project an operation interface, comprising various function buttons, in a system program on a table top of a billiard table; the computer controls the image collecting device to collect images in the scope of the table top of the billiard table in real time, background comparison analysis and front-frame comparison analysis are carried out on current images, and a changed image area in the images is further obtained; the part, close to the billiard table, in the changed area is set to be the initial end of the changed area, the other end is the tail end of the changed area, when the stopping time of the tail end in a certain function button area scope of an operation interface is longer than a preset time, it is considered that the button is selected by a user point, and the computer operates the corresponding system function.