The present invention provides a wristwatch, a wearable device, an emergency help seeking method, and a speed dial method. The present invention can carry out the functions of emergency help seeking and/or speed dial by cooperating a wristwatch or a wearable device putting on a user with the user's mobile terminal. For instance, when the user continuously taps or shakes the wristwatch or wearable device, this action can notify the user's mobile terminal to execute the emergency calling function. According to the number of times the user taps the wristwatch or the wearable device, the mobile terminal can quickly dial, according to the number of times the user taps, a phone number of a contact person corresponding thereto.