Electronic settlement system, electronic settlement method and cash paying method using lcd barcode displayed on mobile terminal

A mobile payment device, comprising:

• a processor configured to register, via a wireless network, a user of the mobile payment device as a first member with a first server system and as a second member with a second server system, wherein:
• the first server system storing first information data about the first member and creating a first electronic barcode corresponding to the first information data, and
• the second server system storing second information data about the second member and creating a second electronic barcode corresponding to the second information data;
• a memory configured to store the first and second electronic barcodes, the first and second electronic barcodes being created and transmitted, via the wireless network, from the first and second server systems, respectively;
• and
• a display configured to display one of the first and second electronic barcodes, wherein:
• the processor is further configured to receive a selection instruction from the user,
• the displayed electronic barcode being a selection by the selection instruction from the user,
• the displayed electronic barcode being configured to be scanned by a barcode scanner of a shop system, and
• the displayed electronic barcode is used for a payment activity of the user to be verified by at least one of the first and second server systems via the wireless network.