Cashier method and system operated through simulated key

The invention discloses a cashier method and system operated through a simulated key, and relates to the technical field of payment. The method comprises the steps of A, configuring a cashier plug-inunit, specifically, configuring a cashier plug-in unit in an operating system; B, setting a triggering condition, specifically, setting a triggering condition in the cashier plug-in unit; C, judging the triggering condition, specifically, judging whether the triggering condition is satisfied or not by the cashier plug-in unit, and if the triggering condition is satisfied, sending a simulation instruction to the operating system; and D, completing the cashier operation, wherein the operating system is connected with a cashier module, the operating system is used for receiving and responding tothe simulation instruction, and the cashier module is used for completing the instruction action of the operating system and completing the cashier operation. The beneficial effects of the invention are that the method can ach