A RFID switch tag device includes a first cover and a second cover, a tag circuit, and an activation circuitry. The first and second covers cooperatively define therein an accommodating space. The tag circuit is disposed in the accommodating space and fixed onto the second cover. The tag circuit includes: a signal enhance circuitry, and at least one ultra-high frequency RFID module spaced from the signal enhance circuitry. The activation circuitry is disposed in the accommodating space, and the activation circuitry couples the signal enhance circuitry with one of the at least one ultra-high frequency RFID module.