PROBLEM TO BE SOLVED: To provide an activity quantity monitoring system which can be applied to rehabilitation of a patient whose one-side of the body is paralyzed.SOLUTION: An activity quantity monitoring system 100 comprises: an information processing device 110 an activity quantity monitoring device 131 which is attached to an arm of a subject on the healthy side of the body and an activity quantity monitoring device 132 which is attached to an arm of the subject on the paralyzed side of the body. The information processing device 110 comprises: registration means which registers the activity quantity monitoring device 131 and the activity quantity monitoring device 132 in association with each other and analysis means which identifies and acquires activity quantity measured by the activity quantity monitoring device 131 on the basis of the registration contents and calculates a first effective total activity quantity, and also identifies and acquires activity quantity measured by the activity quantity monitoring device 132 on the basis of the registration contents and calculates second effective total activity quantity, in order to calculate ratio of the first effective total activity quantity to the second effective total activity quantity.COPYRIGHT: (C)2015,JPO&INPIT【課題】 人体の片側が麻痺している患者のリハビリにおいて適用可能な、活動量監視システムを提供する。【解決手段】 情報処理装置110と、被検者の健常側の腕に装着される活動量監視装置131と、前記被検者の麻痺側の腕に装着される活動量監視装置132と、を備える活動量監視システム100であって、情報処理装置110は、活動量監視装置131と活動量監視装置132とを対応付けて登録する登録手段と、登録内容に基づいて、活動量監視装置131にて測定された活動量を識別して取得し、第1の有効総活動量を算出するとともに、登録内容に基づいて、活動量監視装置132にて測定された活動量を識別して取得し、第2の有効総活動量を算出することで、該第1の有効総活動量と該第2の有効総活動量との比率を算出する解析手段とを備える。【選択図】 図1