Payment method, device, equipment and system based on POS (Point Of Sale) of user terminal and medium

The invention discloses a payment method, device, equipment and system based on a user terminal POS and a medium, and belongs to the technical field of payment. The method comprises the following steps: triggering an acquiring SDK (Software Development Kit) to obtain an eSE mapping identifier and an SIM (Subscriber Identity Module) card mapping identifier and send the eSE mapping identifier and the SIM card mapping identifier to a POS (Point of Sale) system platform under the condition that a user terminal senses a non-contact payment card, so that the POS system platform performs verification based on the eSE mapping identifier, the SIM card mapping identifier and a pre-stored binding relationship; under the condition that the verification is passed, according to the type of the non-contact payment card, executing one of the following operations: calling a TEE password keyboard through the POS control to complete payment; payment is refused; and calling a payment confirmation page of a payment application in