Abstract: To provide a technique for maintaining high efficiency of advertisement images. In response to a request for a banner advertisement data set from a terminal device, a second banner distribution server device selects a banner advertisement data set at distribution frequencies that are determined in advance, and distributes the selected banner advertisement data set to the terminal device. For the first distribution term, the second banner distribution server device determines distribution frequencies so that each attribute of each component comprising a banner advertisement image is contained in distributed banner advertisement images at an equal rate. In the second and later distribution terms, banner advertisement data sets that had CTRs equal to or greater than a baseline-CTR in the previous distribution term are continuously distributed.