A method and device for reminding a user are provided. The method includes: monitoring a region in which a mobile terminal presents; when a reminding operation of the mobile terminal is activated, determining a target region in which a human body presents; and if the target region doesn't comprise the region in which the mobile terminal presents, sending a reminding notice to a reminding device in the target region for instructing the reminding device to send a reminder corresponding to the reminding operation to the user.