As the needs of fast food are increasing, the competition among fast food restaurants becomes more furious. We have no doubt about it that the most famous fast food company is McDonald. Why is it so successful? First of all, they work twenty four hours a day. Only this has already made them stay at leading edge because when others’ close, they still open. That means they have more chances to serve customers, and to build up their resumption. Their catchword is “when you are up, we are ready”; they satisfy the special needs. Therefore when customers, especially those who like to eat at midnight, the first name come to their minds would be McDonald. Second, they change themselves along the needs of customers. They are the first fast food restaurant who provides breakfast menu. Most of people don’t want to eat too