'Yoo Nai 3D' is a positioning information service platform which shows the path of the movement of people or objects inside the building. It employs an anchor and a wireless signal device called Tag equipped with small embedded technology low-energy Bluetooth and Wi-Fi standards that can communicate over longer distances than RFID. It can be applied to various industries such as retail business, large trade shows, warehouses, robots, agricultural plants, medicine, and schools.