An alarm bell system for danger areas (e.g. underground parking garage) to prevent incidents via instant communication with security or emergency room workers. When a person presses the button on the bell in case of emergency, the emergency alarm goes off and lights warning is turned on. Also, the location of the device is displayed on the Mapping PC management program of the main system, and the person who pressed the button can communicate with security staff through an emergency communication system using built-in speaker and mic.