In this book, it concerns how to predict customer' emotion to judge how to manufacture the most suitable taste of products to satisfy your clients' needs or how to design your products to attract them to buy successfully. I shall use three science and psychology ethnographic research and facial reading technology and online consumption behavioral
methods to explain how to predict your client's individual taste and need more accurate.I believe that any product manufacturers can have more confident or success to attract their clients to buy their products if they can predict their clients' taste to their products more accurately. Readers can learn more methods to know whether how and why consumer emotion changes more easily.