In this paper, the authors develop a wireless automatic checking system for a number of emergency lights at the same time via Internet. The proposed system can check the status of emergency lights including the battery with charger using a microprocessor-based detector in a scheduled period. Every emergency light is assigned a respective identification number. Then, the nearby transmitter/receiver module can transmit the checking results to the remote transmitter/receiver module. Also, the nearby computer is linked with the microprocessor-based data processor that connects with the remote transmitter/receiver module via RS232.