PROBLEM TO BE SOLVED: To provide a grazing system for more efficiently performing everyday health management by finely observing action of grazed livestock.SOLUTION: An action such as walking or grazing of livestock is observed by a radio communication device including a solar panel 10 and a GPS sensor 11 on a spot easily receiving sunlight such an ear or a neck of the livestock, and a biological information sensor 24 for measuring a body temperature and a pulse by detecting a body current in the livestock is provided on a breast part or the like of the livestock, and action information and biological information of the livestock are transmitted periodically to a livestock administrative server 1 through a radio relay station 4, together with GPS information.SELECTED DRAWING: Figure 1【課題】放牧中の家畜の行動を、キメ細かく観察し、毎日の健康管理をより効率的に行う放牧管理システムを提供する。【解決手段】家畜の耳や首などの太陽光を受けやすい箇所にソーラパネル１０、GPSセンサ１１を含んだ無線通信デバイスが家畜の歩行、採食などの行動を観察するとともに、家畜の乳部などに家畜の体内の電流を検知し体温、脈拍を測定する生体情報センサ２４を設け、家畜の行動情報と生体情報が定期的に、GPS情報と共に、無線中継局４を介して家畜管理サーバ１に届くようにする。【選択図】図１
