I started to interest me for the thoughts of Sun Tzu after having read in the Eighties the Art of the war, and a phrase in particular called my attention: ' ' all battle is earns before being empreendida' '. Thus the famous strategist said who lived in century IV a.C.Em the market research this if she applies and evident valley very! The importance of the valuable called product information, if makes basic so that if makes an elaborated marketing research well and better to understand the market-target. It must be made use of important information on its field of performance, of its business, in the importance of the competition and clearly of its customers. The process of a research consists of the definition of the problem and its objectives, development of the research plan, collection of information, analysis of these and presentation of the results so that it can be managed. It must, in the principle then to decide if they must collect the data or use given already available. They must also decide on which will be the boarding of the research, as: comment, focal group, survey, experiments and that instruments of the type of questionnaires will have to be used. The main reason to adopt the marketing research is the discovery of a market chance. A time with the concluded research, the company must, carefully, evaluate its chances and decide where markets to enter. In the marketing research it serves to determine what the consumers want and how much they are made use to pay.