An image processing system is formed of an image forming apparatus and a charge apparatus connected to the image forming apparatus. The image forming apparatus comprises a communication unit, a memory unit for storing charge information to be stored in the charge apparatus when disconnected from the charge apparatus, and a control unit for controlling the charge information stored in the memory unit to be stored in the memory unit when connecting to the charge apparatus. The charge apparatus comprises a communication unit, a memory unit for storing the charge information received from the image forming apparatus, a judgment unit for judging as to whether the charge information stored in the memory unit is in a renewal waiting state; and a control unit for notifying a user where the judgment unit judges that the charge information stored in the memory unit is in the renewal waiting state.