The system includes a control module, an environment detection unit and an electricity generation module. The control module includes a control unit for data processing and operating and an alarm unit, electrically connected to the control unit for receiving a command of the control unit. The environment detection unit is electrically connected to the control unit of the control module for detecting a physical quantity of environmental matter to generate a signal to send back to the control unit. The electricity generation module is electrically connected to the control module and has an electricity generator for generating electricity by environmental energy to supply the control module and the environment detection unit.