An object of the present invention is to appropriately measure an unloading amount of a load applied to a user. A first measurement value in which a weight based on a weight of a powered suit 100 having a mechanism for holding a load worn by a user and holding a load worn by the user and a weight of the user is transmitted to a ground contact surface, and a weight of the user. And a second measurement value whose weight is transmitted to the ground contact surface is obtained, and the unloading amount of the load to the user is calculated based on the first measurement value and the second measurement value. [Selection diagram] Fig. 1【課題】ユーザに係る負荷の免荷量を適切に計測する。【解決手段】ユーザに係る負荷を軽減し当該ユーザが装着する荷物を保持する機構を有するパワードスーツ１００の重量とユーザの体重とに基づく重量が接地面に伝わる第一計測値と、ユーザの体重に基づく重量が接地面に伝わる第二計測値とを取得し、それら第一計測値と第二計測値とに基づいて負荷のユーザに対する免荷量を演算する。【選択図】図１
