A contact person selecting interface is provided on a mobile terminal for a user. Using such an interface, the user can select one or more contact persons that are desired to transmit reminders. When receiving an incoming call or a new message, the mobile terminal determines whether a person sending the incoming call or the new message is selected by the user. If yes, the mobile terminal makes a wearable device give out a prompt message for remaindering the user. In such a way, it is convenient for the user to trace important calls or messages.