A control system and method of advertisement exposure are provided, in which the control system for advertisement exposure includes: a communication unit for communicating via a network with a multiplicity of client terminals, each including a web browser having a main area where a predetermined webpage is output and a sub area different from the main area; a storage unit for storing advertisement information and information about an incentive created to correspond to the advertisement information and offered to a user; and a control unit for outputting the advertisement information to at least one of the main are and sub area, and accumulating a corresponding incentive depending on an amount of viewing by plural users for the advertisement information to output information about the accumulated incentive to the sub area of the web browser. Accordingly, the advertisement information can be exposed more effectively through the web browser.