The invention is applicable to the technical field of billiard balls, and provides a billiard ball game scoring system which comprises a camera shooting device, a computer and an output device, the camera shooting device is used for acquiring video information of a table top containing a billiard ball table and billiard balls on the table top, the computer is used for analyzing the video information based on a pre-constructed module to obtain position information of the billiard balls, determining current game scene states according to the position information, scoring and/or acquiring a current striking party based on the scene states and rules corresponding to kinds of the billiard balls, and the output device is used for outputting scoring information of game parties and the current striking party. According to the system, the scoring information of the game parties and the current striking party are automatically outputted, scoring efficiency is improved, and the billiard ball gamescoring system is simple to operate and has high practicability and usability.