To provide a paper-rock-scissors support system which can be offered for communication of customers in a restaurant, and as a result, it can improve sales of the restaurant.

In a terminal device 1 arranged at each table T of the restaurant, paper-rock-scissors component screen in which components of the paper-rock-scissors which consists of rock, scissors, and paper are shown is displayed, and victory or defeat of paper-rock-scissors is decided based on a paper-rock-scissors component chosen by the paper-rock-scissors component screen in the terminal devices of both tables. On the basis of the victory or the defeat of the determined paper-rock-scissors, a paper-rock-scissors victory or defeat screen in which it is shown that he or she is a winner or a loser of the paper-rock-scissors is displayed on a display of the terminal device 1 of the both tables T.