The disclosure is related to a behind-ear temperature monitoring apparatus, a system, and a monitoring method. The device body of the monitoring apparatus has an ear-hanging member for fixing the apparatus into the ear, and a housing for containing circuit units of the apparatus. A first magnetic element is disposed at the side close to earlobe within the housing. The apparatus includes a behind-ear temperature sensing member that is connected to the device body using a bendable connection member. The behind-ear temperature sensing member has a second magnetic element and is fixed onto the earlobe by means of magnetic force between the first and second magnetic elements. A temperature sensing module is disposed in the behind-ear temperature sensing member, and is electrically connected to a micro-controller in the device body via a circuit buried in the bendable connection member. The temperature behind the ear is therefore measured.耳背溫度感測裝置、系統以及溫度監控方法,耳背溫度感測裝置的裝置主體具有一固定於耳部之耳掛部以及設置有電路單元的殼體,殼體內對應於耳部之耳垂的位置設有第一磁性元件;裝置包括有一耳背溫感部,係以一可彎曲的連接部連接於裝置主體,其中設有第二磁性元件,通過第一磁性元件與第二磁性元件相互磁吸的方式,可以將耳背溫感部固定於耳垂之另一側,耳背溫感部設有一溫度感測模組,經由一埋於連接部內的線路電性連接設於裝置主體之殼體內的微控制單元,可以取得耳背量測部位之體溫。30‧‧‧耳背溫度感測裝置301‧‧‧微控制單元303‧‧‧溫度感測模組305‧‧‧電力指示單元313‧‧‧電力指示介面307‧‧‧電力單元315‧‧‧電力開關317‧‧‧充電介面309‧‧‧無線通訊模組311‧‧‧耳掛部312‧‧‧裝置主體321‧‧‧耳背溫感部319‧‧‧連接部331‧‧‧第一磁性元件332‧‧‧第二磁性元件302‧‧‧線路
