To provide a questionnaire system capable of quickly and easily analyzing answers of questionnaires because each answerer answers questionnaires while observing a real commodity at the time of purchasing the commodity and respective answers are totalized through a network.

The questionnaire system is provided with a questionnaire management device for managing the number of times of answering questionnaires in each customer and analyzing the answers of the questionnaires, a shopping cart having an answer input means for reading out a commodity code, displaying questionnaires corresponding to a commodity code and answering the questionnaires, a questionnaire receiver arranged in each of selling areas in a store and capable of receiving the answers of questionnaires from the shopping cart, a POS terminal for executing commodity discount processing in accordance with the number of times of answering the questionnaires when the customer executes adjusting processing, and a network system spread in the store.