The invention discloses a wireless sensor network-based automatic scoring system for billiards. The system consists of a recognition node (1), a score display node (2), a player selection node (3), a remotely-controlled adjusting node (4) and a routing node 5, wherein the recognition node (1) is used for recognizing billiards; the score display node (2) is used for counting and displaying a score; the player selection node (3) is used for judging the identity of a ball hitting player; the remotely-controlled adjusting node (4) is used for adjusting the score; the routing node 5 can complete data routing function; the nodes communicate with one another in a wireless mode; a billiard is recognized by an image sensor and a microprocessor on the recognition node (1) according to a set recognition algorithm program; and scoring and score display of a competition are completed through a scoring rule program on the score display node (2). The system has the advantages that: sensor network technology is applied to automatic scoring of billiards, a self-networking and easily-deployed wireless network automatic scoring system is established to replace the conventional manual or wired counting mode, the system is used conveniently by manufacturers and in competition gymnasiums, stadiums as well as places of entertainment, and convenience is brought to a large number of billiard enthusiasts.