PSAM card online authorization authentication method, device and system

The invention provides a PSAM card on-line authorization authentication method, device and system. The method comprises the following steps: inquiring the remaining number of authorizable times from a counter according to an authentication request of a PSAM card received from a lane charging end; when the number of remaining authorizable times is not lower than a preset value, generating authentication key data for the PSAM card and returning the authentication key data to the lane charging end, so that the lane charging end uses the authentication key data to authenticate the PSAM card; and receiving authentication success information returned by the lane charging end, and subtracting 1 from the number of authorizable times of the PSAM card in the counter. The application mode of the PSAM card is changed, the original mode that the PSAM card can be used after being electrified is changed into the mode that the PSAM card can only be used after networking authentication, it is guaranteed that the PSAM card can