POS SYSTEM, POS SERVER, STORE TERMINAL, SALES MANAGING METHOD AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a POS server which can immediately respond to a request from a store terminal. SOLUTION: The POS server 100 managing the transaction of a commodity in a plurality of stores is provided with plurality of managing devices 210 connected to a plurality of store terminals 300 arranged in a plurality of stores. The managing device 210 is provided with a transaction data base 116 storing the content of the transaction of the commodity, which is performed in the store terminal 300, a receiving part 152 receiving a data base operation instruction reflecting that the commodity is transacted on the transaction data base 116 from the store terminal 300 and a data base updating part 162 updating the transaction data base 116 based on the received data base operation instruction. The respective receiving parts 152 of a plurality of managing devices 210 receive the same data base operation instructions which the store terminal 300 transmits to the managing devices.