Culture is one of the important components of international business. This is the content that most challenging for international business. Because the cultural environment is often difficult to identify, understand cultural environment that values and beliefs are shared and believed to be correct by a group, a community. National culture is understood as the beliefs and values shared by both the countries. Beliefs and values often shaped by factors such as history, language, religion, geography, government, and education; so businesses need to understand the cultural analysis of these factors. As we can see, culture and management style and general management practices in each particular business will be directly affected by the culture in which their executives belong to that culture. Through researchers, we also see that culture is a major factor in the impact, the dominant behavior of consumers, dominant buying behaviors of customers. In addition, family love, understanding social, education ... is still starting when shopping goods - services, meaning that dominated the drafting of the strategy and business strategy at each specific business. When a foreign enterprise will have an idea to open new branch or franchising, they will carefully study the culture, economy, standard of living, and demand to see which countries meet the problem that they put out or not. If they see that the country meets the requirements, they will open a branch or franchising or if not, they will move on to study in other countries to expand market. For examples: McDonald's has joined in Vietnam since the 90s, but after a few days of operation in HCM city, it was closed. Because, at that time, the Vietnam no demand for fast food, and it's too expensive. Nobody puts one large sum to buy McDonald's. In recent years, McDonald’s has seen higher demand VN and they like to eat fast food, enjoy the modern. So, in February 2014, McDonald's has returned to Vietnam in HCM city.