The purpose of this invention is to perform air-cleaning control according to the brightness and the activity of people within a room. An air-cleaning device (100) comprises: a first determination unit (11) which determines at least whether there are no people inside the room in which the air is to be cleaned, there are people and minimal activity, or there are people and a great deal of activity, from the detection signal of the motion detection sensor (31)； a second determination unit which determines at least whether the room in which the air is to be cleaned is in a light state or a dark state, from the detection signal of an illumination sensor (32)； and an operation control unit (13) which controls the operation of the air-cleaning function using the determination results of the first determination unit (11) and the second determination unit (12).根據室內的人的動作與亮度執行空氣清淨控制。空氣清淨機（100）具備：第一判定部（11），從人體感測器（31）的偵測信號至少判定於空氣清淨對象室內為無人存在的狀態、有人存在且動作少的狀態、及有人存在且動作多的狀態的哪一個；第二判定部（12），從照度感測器（32）的偵測信號至少判定空氣清淨對象室內為亮的狀態、及暗的狀態的哪一個；以及運轉控制部（13），使用第一判定部（11）及第二判定部（12）的判定結果控制空氣清淨功能的運轉。
