A method and system for controlling real-time bidding for online advertisements is disclosed. According to one embodiment, a computer-implemented method comprises receiving a real-time bidding (RTB) request from a bidder. The RTB request contains a campaign target. An online advertisement campaign corresponding to the RTB request is placed. Campaign performance data is received from an impression server and/or an event server. The campaign performance data is compared to the campaign target. Based on the result of comparison, it is determined whether to enable or disable the online advertisement campaign.