Method for providing advertisement and system for executing the method

A method for providing a keyword advertisement using a keyword purchase record of an advertiser is provided to supply a benefit such as frequent exposure about a product which an advertiser desires to advertise on the internet to the advertiser registering a plurality of keywords related to an advertisement group or an advertisement campaign, thereby leading the advertiser to register more keyword advertisement on the internet. A method for providing a keyword advertisement using a keyword purchase record of an advertiser comprises the following steps. A ranking of advertisers is calculated using a purchase record corresponding to a keyword advertisement(S310). The keyword advertisement is arranged based on a user keyword using a purchase record corresponding to the keyword advertisement(S320).