To provide commodity information corresponding to each area characteristic to a user accessing an electronic mail at first in an interconnection network (Internet) shopping system.

When a user accesses an electronic mail at first, a server computer 30 retrieves a domain table 402 by a domain server name to which a transactor's personal computer(PC) 10 e.g. belongs and specifies the resident area of the user of the PC 10. Commodity information is selected successively from a commodity having the largest result value of the number of sold units or a sales amount in the specified area by referring to an area-sorted sales result DB 403 and the selected information is provided to the PC 10.