A URL selection method disclosed in the present application includes a first extraction step and a second extraction step. The first extraction step extracts URLs up to an upper limit value of the number of URLs set to each of URL groups in a range where a total number of URLs is within a predetermined number of URLs, in order of priority set to each of the URL groups, from each of the URL groups identified by analyzing a traffic log by techniques in different categories. The second extraction step further extracts URLs within the predetermined number of URLs, based on the priority, when the total number of URLs extracted from each of the URL groups in the first extraction step is less than the predetermined number of URLs.