Password resetting method and device

The invention discloses a password resetting method and device which are used for solving the problems that in the prior art, resources are unreasonably used, the digit number of a queryable rechargeable card password is few, the safety performance is poor, and system loads are large. The password resetting method includes the steps of receiving a first rechargeable card serial number sent by a client terminal, a rechargeable card password known part and a rechargeable card password unknown part, enabling the rechargeable card password unknown part to be random numbers generated by the side of the client terminal, enabling a combination of the rechargeable card password known part and the random numbers to serve as a rechargeable card random password, and enabling the rechargeable card random password to serve as a reset rechargeable card password to be sent to the client terminal after determining that a second rechargeable card serial number, corresponding to the rechargeable card random password, sent by the client terminal is not conflicted with other rechargeable card serial numbers. By means of the technical scheme, the querying digital number of the rechargeable card password is not limited, the safety performance is high, as password resetting is carried out according to the serial number, the system loads are effectively reduced, the finding process of the rechargeable card password can be conveniently and rapidly achieved, and the resources are reasonably used.