The present invention relates to a method for transacting a game item or a service item in an online electronic commerce service method. Item transaction between individuals can be provided through an item intermediate dealer, like a certified realtor of real estate.(130) Manager(200) Item agency service system(300) Access server(310) Connector management system(320) Transaction management system(400) Item transaction system(410) Electronic commerce system(500) DB server(510) Member management DB(520) Item management DB(530) Transaction information management DB(540) Settlement management DB(AA) Internet mobile ARS(BB) Item agency service configuration diagram(120) Consignment agent(110) Member(100) UserCOPYRIGHT KIPO 2015