PAD refers to the promotion plan of automatic external defibrillators being installed in public places and encouraging the general public and other non- professional emergency personnel to accept training, which can become AED popularization education activities for on-site rescuers to use AED at any time. 

The proposal and development of Public defibrillation plan are considered to be the most successful and most effective progress of emergency medicine field . In the event of sudden cardiac death,  witness rescue at the scene is very important. PAD obtained public recognition, AED is convenient and effective when any person in under sudden cardiac arrest.  In the face of patients with sudden cardiac arrest, everyone has a rescue responsibility and obligation, all shall become the on-site rescuers, and any after simple training of how to use AED may be able to save the cardiac arrest patient's life.