To provide a method and system for marketing capable of collecting many pieces of customer information at a low cost.

A consumer A obtains a store information card 1 based on an information bulletin board B provided plural store information cards 1 for specifying a store C. When he/she utilizes the store C as a customer A', he/she obtains an access card 2 for identifying a customer by presenting or exchanging the card 1 and accesses to a server D based on the access card 2. The server D sends a response message concerning a questionnaire to the customer A' having accessed based on the card 2, and records the responding contents of the customer A' as customer data.