Method for implementing banknote counting of banknote counting device, and banknote counting device

A banknote counting device, comprising:

• a recording module, configured for turning on counterfeit distinguishing function if a banknote counting instruction carrying user identity information is received, and if counterfeit banknote is detected during the banknote counting process, recording the sequence of the counterfeit banknote, the denomination of each counterfeit banknote, and the quantity of the counterfeit banknote;
• an extracting module, configured for extracting the counterfeit banknote from the banknotes that have been counted according to the sequence of the counterfeit banknote, and calculating the amount of the counterfeit banknote based on the quantity of the counterfeit banknote and the denomination of each counterfeit banknote;
• a determining module, configured for acquiring the user identity information in the banknote counting instruction, and determining, according to the user identity information, whether a circulation amount and number of times of circulation of counterfeit currency having a mapping relationship to the user identity information exist in a preset counterfeit currency circulation database;
• a calculating module, configured for, if the circulation amount and number of times of circulation of counterfeit currency having a mapping relationship to the user identity information exist in the preset counterfeit currency circulation database, calculating the sum of the circulation amount of counterfeit currency and the amount of the counterfeit banknote, and updating the circulation amount of counterfeit currency according to the sum;
• and adding “1” to the number of times of circulation of counterfeit currency and updating the number of times of circulation of counterfeit currency according to the calculation result;
• and
• an alarming module, configured for, if the updated circulation amount of counterfeit currency is greater than a preset amount threshold and the updated number of times of circulation of counterfeit currency is greater than a preset number of times of circulation threshold, sending an investigation instruction to the public security department according to the user identity information, the updated circulation amount of counterfeit currency, and the number of times of circulation of counterfeit currency, to allow the public security department implementing the investigation instruction in time.