The invention discloses a power source and signal transmission device of an induction bolt and an induction bolt device. The power source and signal transmission device is applied to the induction bolt with a first contact set and comprises a cap module and a supply module. The cap module is arranged at one end of the induction bolt and is provided with a cap cover circuit board module. A second contact set of the cap cover circuit board module is in electrical contact with the first contact set and is electrically connected with the induction bolt as a power source and a signal. The supply module is inserted into the cap module, and the supply module is electrically contacted with a third contact set of the cap cover circuit board module through a fourth contact set so as to transmit an external power supply to the induction bolt or access information stored by the induction bolt. Therefore, the problem that the electric power of the induction bolt is continuously supplied is solved,the sensed signals and the peripheral system can be transmitted in a wired or wireless remote transmission mode in time, and the locking state of the bolt is monitored.