Abstract: The present invention relates to an online product selling method and a server and system for implementing the method. The online product selling method is performed by an online product selling server. At least one open selling web page in which detailed product information including a name and a provider of each product is displayed is registered. At least one closed selling web page in which riddle data associated with at least one of a name and a provider of each product is displayed and in which detailed product information including the name and the provider of the product is not displayed is registered. A web page transmission request is received from a relevant terminal. Any one of the open selling web page and the closed selling web page is transmitted to the terminal. A payment procedure is performed and then the product is sold.