To increase a customer collection force into an area where each store cooperates by the cooperation of each store by developing acting service of sales analysis for analyzing sales situation of each store and informing each store of it.

A service acting server 1 registers members between a store terminal unit 2 side and the service acting server 1 through the Internet 3. The service acting server 1 collects sales data from a store which is a member user and analyzes sales. In this case, it performs totaling depending on store and time zone, totaling depending on store and commodity, totaling depending on store and dealings, totaling of best-selling commodities depending on area, and totaling depending on area and commodity. The service acting server 1 transmits the results of the analysis to the store terminal unit 2.