To provide a biological-information analyzing device, a biological-information analyzing system, and a biological-information analyzing method that can appropriately measure biological information even in a user having an athlete's heart. A biological-information analyzing device includes a biological-information detecting section configured to detect biological information of a user, a user determining section configured to determine an exercise capability of the user, an information setting section configured to set, when it is determined that the exercise capability of the user satisfies a predetermined condition, analysis information corresponding to the exercise capability of the user, and an analyzing section configured to analyze the biological information on the basis of the set analysis information.