1. A group information generating system comprising: a group border information generating unit configured to generate a border information indicating at least one border of group when medical images sorted into the group are to be indicated according to an information included in a medical image information; and a group information generating unit configured to generate a group information according to the border information, the group information meaning a discernment information of the group to which an image indicating information included in the medical image information for indicating one of the medical images is belong.