A method and device for detecting separation of a wearable apparatus. The method comprises the following steps: detecting, by means of an acceleration sensor, whether a wearable apparatus is in an unfastened state (S11) if the wearable apparatus is in the unfastened state, after elapse of a preset time period, detecting whether the wearable apparatus is in a still state (S12) and if the wearable apparatus is in the still state, determining that the wearable apparatus is separated, and giving a separation warning (S13). The invention detects a state of a wearable apparatus, and the wearable apparatus is determined to be separated after the wearable apparatus has been in an unfastened state and a still state in a sequential order, such that a separation warning can be issued timely. The separation detection performed by sensing a change in states has high precision, and thus a user is less likely to experience inconvenience resulting from erroneous determination. When the wearable apparatus is separated, a warning is issued to the user timely, thereby enabling the user to retrieve the wearable apparatus immediately, and accordingly preventing the wearable apparatus from being lost.Linvention concerne un procédé et un dispositif de détection de la séparation dun appareil portable. Le procédé comprend les étapes suivantes consistant à : détecter, au moyen dun capteur daccélération, si un appareil portable est dans un état non fixé (S11) si lappareil portable est dans un état non fixé, après écoulement dun laps de temps prédéfini, détecter si lappareil portable est à létat immobile (S12) et si lappareil portable est à létat immobile, déterminer que lappareil portable sest séparé, et émettre un avertissement de séparation (S13). Linvention permet de détecter un état dun appareil portable, et on détermine que lappareil portable sest séparé après que lappareil portable se soit retrouvé dans un état non fixé et à létat immobile dans un ordre séquentiel, de telle sorte quun
