Abstract: A selling system of a performance ticket including a server that supplies a performance information to a client terminal through a network comprises the server includes a performance information transmitting function which transmits the performance information stored in the performance information DB; an application procedure transmitting function which transmits a purchase information which is stored in a purchase procedure information DB and shown the purport that a selection method of a “lottery system” and an “auction system” about the application of the performance ticket in a display screen of the client terminal; a success-in-an-election probability transmitting function which transmits the success-in-an-election probability information acquired and based on a success-in-an-election probability rule on the basis of a total number of the application and sold ticket number of sheets to the applicant who participates in an auction hall; and a function transmitting notice of success