Automatic bell control system based-on campus network is designed. Each node within the system are based on TCP / IP protocol and controls all the bells within the region. The node controller based microcontroller AT89S2051and Ethernet controller ENC28J60 is developed. Centralized control and management of the entire campus bell can be made by any PC within the campus network . The system is designed based on the original campus Ethernet network, so it is lower line laying cost, high reliability, easy maintenance and management.