Abstract: Page access log information, answer log information and click log information record the access counts to respective contents. A contents check list sets values corresponding to an aimed value of the access contents to contents as a target, and sets a measure when the contents do not obtain the aimed value. A contents server refers to a corresponding log, and sums the access count to contents from the start date of release of the contents to the latest date when the log can be acquired on the day of check before the time limit. The contents server refers to the list, and checks whether this access count has reached its aimed values or not. When the access count has not reached the aimed value, the contents server performs a measure for the contents.