An anti-counterfeiting system includes an NFC tag attached to a product, a mobile device capable of sensing the NFC tag, and a server receiving and transmitting signals from and to the mobile device. The mobile device reads verifying codes of the NFC tag and generates a location data by a GPS unit, and then transmits the verifying codes and the location data to the server. The server verifies the verifying codes and the location data, and then transmits a message back to the mobile device and shows the verifying result on a display of the mobile display.