To increase the efficiency of a transaction of information in an online shop and the like and efficiently collect information sufficiently relative of the taste of an operator for merchandise.

A batch processing part 31 disposed in a Web browser 30 displays a list of pieces of merchandise selected by an operator (purchaser) from among a plurality of Web pages such as a merchandise catalogue, separately from the merchandise catalogue, and according to a transmission command by the operator, transmits information on each piece of merchandise to a Web server 26, so that the Web browser and the Web server establish no communication until all merchandise items are set to reduce a load on a network. The time of the selecting operation by the operator on each piece of merchandise is recorded and transmitted to an information collecting part 27a in a server 20, which can thus easily collect information accurately indicative of the taste of the operator for the merchandise.