The present invention relates to an advertising method and system that when a service of a card game is provided to member customers online by using a deck of playing cards in which an advertisement is converted into a story, provide an inseparable relationship between a game and an advertisement, thereby allowing players participating in the game to enjoy the advertisement contained in the playing cards together with the game in an amusing and interesting manner. According to an embodiment of the present invention, there is provided a system for advertising through a playing card game, in which a plurality of player terminals connects with a game server over a network and plays a game using a deck of playing cards (hereinafter “cards”) created by converting an advertisement into a story.