There are provided a system and a method for analyzing and/or estimating a state of a banknote processing apparatus. The system includes an information detector configured to detect use information of the banknote processing apparatus in real time, a state estimating apparatus configured to produce statistical information based on the detected use information and produce state estimation information on a state of the banknote processing apparatus and/or an operating environment of the banknote processing apparatus using the statistical information, and a database configured to store one or more of the use information, the statistical information, and the state estimation information.