The invention provides a card device having a
fingerprint identifying function, and a corresponding charging device thereof. A
fingerprint acquisition unit acquires a
fingerprint image of a finger pressed on the fingerprint acquisition unit; a fingerprint identifying and
processing unit stores and compares the acquired fingerprint, and selectively activates a
control signal output unit according to a comparison result; the
control signal output unit receives an activation instruction and outputs a
control signal to the outside; the card device also comprises a chargeable battery adapted to the thickness of the card device and used for supplying power to the fingerprint acquisition unit, the fingerprint identifying and
processing unit and the control information output unit; and the chargeable battery has or is connected with a
smart card universal contact interface module used as a charging interface. The combination of a fingerprint
identification system and a traditional card device is realized, the safety of the
system is guaranteed, and an active battery power supply
system working in an active working mode is adopted, so the card device has improved reliability and stability, allows a user to charge in a plug-in manner, and is simple and fast.