To make information exchange active by advertising service or merchandise on a home page on an internet from an information exchange service company G in place of its provider and mediating a question from a general terminal and an answer from the provider.

The information exchange service company G receives merchandise information and the information of the destination to contact from the various industries and publishes only the merchandise information on its own home page on an internet 7. A terminal 1 of consumer gets specified merchandise information from here and transmits the question concerning the information of specified merchandise to the mail address of the company G. The G takes out the question and reports it to the provider of merchandise information, and the provider of merchandise information prepares the answer for the question and returns it to the G. The company G transmits this answer to the mail address of questioner and the terminal opens its own mail box on the internet and takes out the answer. Based on the information showing the destination to contact of provider for specified merchandise information provided from the company G through the similar procedure to the terminal, the consumer directly makes contact with the provider of merchandise information.