Fake and inferior commodity demanded by consumers (FICDC) means that consumers initiatively choose to buy fake and inferior commodity. The cause of its formation is that this kind of fake and inferior commodity is very cheap relative to its original. Although it is better off its consumers and suppliers, it is worse off RD and production of new products, and will preclude producers from improving product quality, even cause the debasement of whole product quality in the market. Thereby it is worse off consumers' long benefit.