Embodiments herein properly determine relevance between persons. Embodiments herein provide a system for evaluating relevance between persons, including relevance detecting means for detecting directed relevance of a person as a target to another person based on a text in which evaluations or feelings of the other person by another person is expressed; storing means for storing the detected relevance; evaluating means for evaluating, with respect to a set of a first person and second person to be evaluated, relevance between the first person and the second person based on a plurality of relevances including the stored relevances and reaching the second person from the first person via at least one further person; and outputting means for outputting the relevance evaluated.