POS payment refers to the use of POS machines for payment and settlement. POS is a multifunctional terminal. It can be installed in special merchants and acceptance outlets of credit cards, and connected with computers to realize automatic transfer of electronic funds. It has the functions of supporting consumption, pre-authorization, balance inquiry and transfer, and is safe, fast and reliable to use.

The basic principle of POS payment system is to create commodity data in a computer file, read the barcode on the commodity directly through the online structure of the computer cash register and the optical reading device on the cash register equipment, and then display the commodity information immediately, so as to speed up the cash register and correct it.