a gaming system includes : a reader configured to read chip identification information which identifies a chip used in a casino ; a writer configured to write validity information , betting information , and information about whether the chip is received from a cashier or from a dealer into chip information based on the chip identification information ; and a determination unit configured to determine the validity , the betting state , and the source based on the chip information , wherein the writer is configured to update the validity information from invalid to valid when the chip is handed from the cashier or the dealer to a player and vice versa , to update the betting information as being betted when the chip is placed on a betting area and vice versa .