How can ( non-behavioral economy method) ethnographic research predict consumer emotion ?Ethnographic research is one preferable consumer behavioral psychology method to predict consumers' general shopping model. Because any businessmen can install one video record camera to record the consumers' life habit at home. It aims to watch every video record camera observers whose life habits or life behaviors to evaluate the reasons why who choose to buy the product to make shopping desire more accurate.Critically assess the role of ethnographic research as a means of learning More about buyer behavior. To critically assess whether the role of ethnographic research as a means of learning more about buyer behavior. I shall indicate what the marketers who use general methods to learn more about buyer behavior to compare to ethnographic research difference. In general, marketers learn buyer behavior who shall follow the simplified stages in the buyer decision process, such as the beginning is from need recognition to information search to evaluate to decision to the end of post purchase evaluation stage. Hence, the any buyers behavior shall be cycle stage to decide whether who shall repeat to choose to buy the company's product or use it's service if who feel the product or service had achieved their satisfaction after who spent. The marketers shall use questionnaires or marketing researches to enquire consumers to gather their ideas to analysis to get evaluation to assess whether how whose companies need to produce what kinds of new products style, design, color, price level and sale channels to achieve the most suitable marketing strategy to raise their sale competition. Otherwise, the role of ethnographic search is one different method to learn more about buyer behavior. In general, companies shall not need to arrange questionnaires to enquire participants to fill to answer questions to gather data to carry on evaluation and which do not need to follow the simplified stages to assess target client groups purchase decision process to carry on the sale and post purchase evaluation cycle to evaluate whether what are their product criteria or weaknesses which need to improve to raise their sale competition in their market. I think ethnographic research can get closer to the truth about consumer behavior. On behalf of companies' clients, which can seek to uncover hidden truths about the way their clients' lead their lives, by paying volunteers to be followed for days on end, being filmed and having their every more recorded.