To provide a marketing system for widely collecting the questionnaires of various enterprises from consumers.

The marketing system is provided with a mail transmitting/receiving means 28 having the same mail address as a mail address to be displayed in a predetermined store, and a server 14 which can be accessed from a portable communication terminal 20 owned by a consumer in a store through a communication line 12 transmits attributes questionnaires to make a query to the attributes of the consumer to a portable communication terminal 20, and selects at random and transmits the questionnaires of contents matched with the attributes of the consumer to the portable communication terminal 20, and receives the questionnaire results from the portable communication terminal 20, and transmits the transaction data of the store to the portable communication terminal 20.