1. A jackpot game server configured to provide an online game by simultaneously connecting at least one virtual machine to one or more users via a network, the jackpot game server comprising: a machine manager configured to accumulate game money from each of the one or more users at the at least one virtual machine in real time to create a jackpot, wherein the game money is accumulated whenever the one or more users, who share the at least one virtual machine, plays an online game; a client manager configured to display the jackpot, which is held by the one or more users, who share the at least one virtual machine; a dividend manager configured to increase a dividend of game money acquirable among the jackpot in the at least one virtual machine by each of the one or more users; and a result sharer configured to distribute the jackpot to other users who share the virtual machine when a specific user in the one or more users wins the jackpot.