PROBLEM TO BE SOLVED: To provide a high-security monitoring support device and system and a monitoring support method, capable of predicting a motion of a monitoring object person on an early stage in which the monitoring object person starts to move without false detection or detection delay.SOLUTION: The monitoring support device includes: a sensor which detects a plurality of states of the monitoring object person a state identification means 61 which identifies, based on a detection signal from the sensor, at least one of continuation in one state of the monitoring object person and state change from the other state to the one state of the monitoring object person a selection means 63 which selects a report content and a report destination based on the continuation of the one state or the state change of the monitoring object person and a transmission means 64 which transmits the report content selected by the selection means 63 to the selected report destination.COPYRIGHT: (C)2011,JPO&INPIT【課題】被監視者の動作が開始された早い時期において被監視者の動作予測をし、誤検出、検出遅れ等がない安全性の高い監視支援装置、システム及び監視支援方法を提供する。【解決手段】被監視者の複数の状態を検出するセンサと、センサからの検出信号に基づいて被監視者の一の状態での継続、及び被監視者の他の状態から一の状態への状態遷移の少なくとも一方を識別する状態識別手段61と、被監視者の一の状態の継続又は状態遷移に基づいて通報内容及び通報先を選定する選定手段63と、選定手段63によって選定された通報内容を選定された通報先に送信する送信手段64と、を備えた監視支援装置とする。【選択図】図1