1. A method for providing a social networking service (SNS), comprising: receiving by an input unit of a computer server an original text and one or more comments regarding the original text according to execution of a SNS program; dividing by a control unit of the computer server the original text and the one or more comments into a plurality of threads according to a preset criterion; analyzing by the control unit relationships between users who wrote the original text received by the input unit and/or the one or more comments included in the plurality of threads; and categorizing by the control unit the users according to a result of the analysis; and outputting the result of user categorization to storage for the server to use in a subsequent access request to determine a view of the plurality of threads of original text and the one or more comments.