Installing video camera recording at sample consumers to carry on investigating their feeling to use their product to collect the more truly acceptable or not acceptable feeling to use the product reason, such as: video camera recording method is data synchronization and time series statistics calculation. In the next phase of analysis, video recording are recording with data collected from experimental tasks such as surveys or simple motor tasks. This is done to map the extracted facial geometry information to behavioral output data. In the experiments three to five second intervals of facial expressions were taken one to two seconds before each instance of the behavior to be predicted and used as the input data. After data synchronization we also computed a series of time-domain statistics on coordinates in each interval to use as additional inputs to our classifiers. For example one sample investigating. The input data for this study consisted of videotapes of forty one participants watching films that elicited the emotions of either amusement or sadness, along with measures of their cardiovascular activity responding. It should be noted that the recorded expressions were expressions, unlike the photographs of deliberately posed faces often used in prior facial expression research. However, I suggest these entertainment product or home product manufacturers who can use video cameras to record whose buyers' behavior to detect whose emotion to aim to design which kind of colors, styles, sizes and how to change whose old products' features to attract the more consumers' fresh demand taste . Ethnographic research is interpretative research which seeks an understanding from the perspectives of the value systems of those being researched. Ethnographic search is one different method to learn about buyer individual behavior to compare with enquiring questionnaires to participants to fill to answer questions to gather data 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.