Economy theory concerns how businessmen can attempt to apply which theory is the most suitabe to help them to solve any businesses problems. In traditioanal, economy theory include such as these, supply and demand side theory, invisable hand theory, marketing research theory, inflation or devaluation, revaluation, foreign exchange changing etc. different economic theories. It brings this question: Can businessmen apply any kinds of economic theories to help them to solve any kinds of general or complex business challenges. In my this book, I shall attempt to apply some economic theories to explain whether economic theories can be useful to help any businessmen or managers to solve their business problems when they encounter any businesses challenges in their daily business operation. In my this book, I shall attempt to indicate some organizational cases and find whether what weakness or difficulties it is facing. Then, I shall recommend the best strategy to attempt to help it to solve the kind of challenge, it is encountering. Any have interesting to learn business strategy students, they can learn new strategic knowledge to help these organizations to solve their challenges.Readers can have more clear analytical mind to evaluate whether economic theories are effective to assist businessmen or managers to help them to solve some complex or simple business problems in their organizations.