Introduction I write this book aims to give opinions whether psychological factor can be felt how to predict or influence consumer behavior. Can businessmen attempt to understand the role of psychological factors in determining consumer behavior. It is an attempt to apply psychological and economic knowledge in order to solve significant problems in nowadays competitive business environment. In chapter one, I shall indicate whether " motivation" psychological factors can influence consumer behavior. How can it bring positive or negative influences to cause consumer behavioral changes? In chapter two, I shall explain why and how packaging factor will influence consumption behavior changes. Finally both chapters, I shall indicate economic and psychological methods how to predict or change consumption behaviors in these two sample business cases, such as clothing, property both industries as well asI shall give opinions to conclude how to apply psychological methods to achieve some positive changes in the activities of the commercial organizations in our societies.