The invention discloses an NFC induction device and system. The system comprises MULTIPLE NFC ANTENNA, MULTIPLE RADIO FREQUENCY SWITCH MODULES, a controller and read-write module, the controller controls the radio frequency switch modules to be sequentially conducted in a round robin mode, the read-write module is sequentially connected with each NFC antenna; the read-write module is connected with the NFC antenna; when the NFC tag is close to the NFC antenna, a card searching radio frequency signal can be transmitted outwards through the NFC antenna, when the NFC tag is close to the NFC antenna, the NFC antenna can return a tag radio frequency signal comprising NFC tag information, and then the read-write module determines the information of the NFC tag according to the tag radio frequency signal. The NFC sensing device comprises the plurality of NFC antennas, so that the NFC tag can be sensed at any position of the sensing area formed by the plurality of NFC antennas, the sensing area is increased, the limitation on the close position of the NFC tag is broken through, the probability of wrong position pasting of the NFC tag is lower, and the user experience is improved.