This book concerns how to predict customer' emotion to judge how to manufacture the right food tasteto let your consumers to like to eat your food as well as how to produce or design your products to sell to them successfullyI shall use three science and psychology ethnographic research and artificial intelligent facial machine methods to explain how to predict consumer individual behavior , which is more accurate and what their strengths and weaknesses differences. I wrote this book for several reasons. I want to give my opinions to let businessmen to know how to predict consumer emotion to avoid the risk to spend excess to invent the new products or produce the bad taste foods or soft drinks to promote to enter to sell wrongly. This book teach you how to prepare to produce your products or foods and choose which sale channels can raise your sale successfully. This book consists three sections: This three parts concern my three different psychological and technological methods to explain how to predict consumer emotion to achieve to reduce the risk to avoid to invent the new products or foods to sell unsuccessfully.