Provided is a portfolio creation system capable of accumulating activity records, summarizing the accumulated activity records as a portfolio, and preventing pretension of a third party. The portfolio creation system includes an approval storage table (group user table 211) that stores an approval determined by an adviser who determines approval or disapproval of registration of a user, for each user, an authentication unit that prohibits use of the user who is not given the approval and allows use of an approved user who is given the approval, a user table (205) that stores information relating to the approved user, an activity table (206) that stores the activity record which is a record of an activity of the approved user, an activity record display unit that displays the activity record in a selectable form, and a portfolio creation unit that creates the portfolio based on the information relating to the approved user and the selected activity record.