PROBLEM TO BE SOLVED: To provide situational determination device, system, method and program, where any situational determination is done in high precision and with no instant time response spoiled.SOLUTION: The situational determination device determines the steady conditions of detected situations during a prescribed data section over a prescribed past time length, based on the related data in such a data section over such a past time length. The device includes a situational steady conditional determination means to determine a data section to be used in determining the situations, based on the steady conditions of detected situations, and a detected situational determination means to determine the detected situations based on the data of the determined data section.COPYRIGHT: (C)2010,JPO&INPIT【課題】状況判定を高い精度で判定を行うことができ、かつ時間応答性を損なわずに判定を行う状況判定装置、状況判定システム、その方法及びプログラムを提供すること。【解決手段】検知対象の所定時間長のデータ区間のデータに基づいて、所定時間長のデータ区間における検知対象の状況の定常性を判断し、検知対象の状況の定常性に基づいて、検知対象の状況判定に用いるデータ区間を決定する検知対象定常性判断部と、決定されたデータ区間のデータに基づいて、検知対象の状況を判定する検知対象状況判定部とを有する状況判定装置である。【選択図】図1