The invention provides a notification system and a notification method for file grading treatment. The notification system comprises an upper computer, a signal acquisition machine, a signal processor and a notification machine; the signal acquisition machine comprises a communication interface, a signal modulation module, an acquisition micro-controller and a sending module, which are electrically connected in sequence; the signal processor comprises a receiving module, an information identification module, a display module, a storage module and a processing micro-controller; the receiving module is electrically connected with the processing micro-controller through the information identification module; the display module and the storage module are electrically connected with the processing micro-controller respectively; the upper computer is connected with the signal acquisition machine through the communication interface; the signal acquisition machine is in wired or wireless connection with the receiving module of the signal processor through the sending module; and the signal processor is electrically connected with the notification machine. The notification system and the notification method disclosed by the invention have the benefits that: file importance can be managed in a grading manner, such that confidential information is prevented from being leaked; and thus, the security and the reliability for file management are improved.