A wireless checkout system, comprising: a plurality of peripheral stations (20, 30, 40, 50, 60) located in a store area; a server configured to store location information indicating a position coordinate of each of the peripheral stations in the store area; one or more base stations having a wireless communication range covering the store area; and a mobile point-of-sale terminal including: a wireless communication interface configured to receive a wireless signal from at least one of the one or more base stations; a display; and a processor configured to: set one of the plurality of peripheral stations as an associated peripheral station to be communicated with by the mobile POS terminal for checkout; determine a position coordinate of the mobile POS terminal based on the wireless signal received by the wireless communication interface; obtain the location information from the server; select, based on the position coordinate of the mobile POS terminal and the location information, a closest one of the plurality of peripheral stations that is closest to the mobile POS terminal, other than the associated peripheral station, to be an alternative peripheral station to be recommended for checkout, when the associated peripheral station is not available; control the display to display a screen indicating the alternative peripheral station; wherein each of the plurality of peripheral stations is configured to determine its position coordinate based on a wireless signal from at least one of the one or more base stations and transmit its position coordinate to the server and wherein the processor determines that the associated peripheral station is unavailable based on an unsuccessful communication attempt via the wireless signal. a plurality of peripheral stations (20, 30, 40, 50, 60) located in a store area; a server configured to store location information indicating a position coordinate of each of the peripheral stations in the store area; one or more base stations having a wireless communication range covering the store area; and a mobile point-of-sale terminal including: a wireless communication interface configured to receive a wireless signal from at least one of the one or more base stations; a display; and a processor configured to: set one of the plurality of peripheral stations as an associated peripheral station to be communicated with by the mobile POS terminal for checkout; determine a position coordinate of the mobile POS terminal based on the wireless signal received by the wireless communication interface; obtain the location information from the server; select, based on the position coordinate of the mobile POS terminal and the location information, a closest one of the plurality of peripheral stations that is closest to the mobile POS terminal, other than the associated peripheral station, to be an alternative peripheral station to be recommended for checkout, when the associated peripheral station is not available; control the display to display a screen indicating the alternative peripheral station; a wireless communication interface configured to receive a wireless signal from at least one of the one or more base stations; a display; and a processor configured to: set one of the plurality of peripheral stations as an associated peripheral station to be communicated with by the mobile POS terminal for checkout; determine a position coordinate of the mobile POS terminal based on the wireless signal received by the wireless communication interface; obtain the location information from the server; select, based on the position coordinate of the mobile POS terminal and the location information, a closest one of the plurality of peripheral stations that is closest to the mobile POS terminal, other than the associated peripheral station, to be an alternative peripheral station to be recommended for checkout, when the associated peripheral station is not available; control the display to display a screen indicating the alternative peripheral station; set one of the plurality of peripheral stations as an associated peripheral station to be communicated with by the mobile POS terminal for checkout; determine a position coordinate of the mobile POS terminal based on the wireless signal received by the wireless communication interface; obtain the location information from the server; select, based on the position coordinate of the mobile POS terminal and the location information, a closest one of the plurality of peripheral stations that is closest to the mobile POS terminal, other than the associated peripheral station, to be an alternative peripheral station to be recommended for checkout, when the associated peripheral station is not available; control the display to display a screen indicating the alternative peripheral station; wherein each of the plurality of peripheral stations is configured to determine its position coordinate based on a wireless signal from at least one of the one or more base stations and transmit its position coordinate to the server and wherein the processor determines that the associated peripheral station is unavailable based on an unsuccessful communication attempt via the wireless signal.