This book consists three sections: This three parts concern my three different options to be solved how to use what kinds of methods to predict consumer emotion to achieve to reduce the risk to avoid to invent the new products to sell unsuccessfully. The first section concerns how to use face reading technology predicts consumer emotion to feel enjoyable or not enjoyable to eat sweet foods or drink soft drinking as well as how to use video camera to investigate to predict customer emotion to find what factors had attracted them to choose to buy the manufacturers’ products to use and judge whether who are enjoying or not enjoying to use these products at home. The second section concerns how to find both what the worst attributed factor(s) had influenced the consumers to be caused to decide not to choose to but the product as well as what the best attributed factor(s) had influenced the consumers to be caused to decide to buy the product. I shall indicate how manufacturers can analyze to judge whether what the best and worst attributed factor(s) by steps in every consumer’s constructive choice process. The final third section concerns how to judge whether the online sale channel is more suitable or is not more suitable to compare to the visiting shop sale channel to let the product manufacturers to decide to choose to concentrate on selling their products from internet sale channel or not easily.