Coping with global warming, for saving electricity, lighting sensors are now in widespread used at the areas with brief passing traffic. However, for some existing large spaces such as hallways of large apartments, hotels, office buildings, government offices, and automated assembly lines in factories, large parking lots, warehouses etc, it needs re-wired when installing sensors on existing circuits for achieving lights switching on/off automatically. It consumes much time and manpower. Therefore, Joint Security introduced “Wireless Lighting Sensor System”. This system consists of one “Controller” and many “Sensors”. It utilizes wireless transmission at 433MHz frequency to connect the controller and the sensors which greatly reduces the amount of wiring works. Besides, Joint Security designed battery-powered sensor which can be installed easier.