Abstract: An account administration system and method with security function are provided. The system comprises an identification unit, an issue unit, a portable communication device, and a identification device, wherein after the issue unit receiving the request massage from the portable communication device, a user password will be generated from the issue unit, and the user password will be sent to the portable communication device and the identification unit, thus, user can input the user password to the identification device received from the portable communication device, furthermore, according to the user account used, the identification procedure of the identification unit will exam to be passed for the identification device, such that the online access with the identification unit will be achieved.