With growth of 26-30 percent per year, the fast food market has reached a high and stable growth in the food industries in Vietnam at present. The statement of partnership with Good Day Hospitality in the franchise and opening its first store in 2014 of McDonald's has proved the attractiveness of Vietnam fast food market after integration. By choosing 3 fast food chain stores which have developed with high speed and be the most popular with Hanoi consumers to assess revealed comparative advantage, this research has shown that according to the judgment of the consumers, KFC fast food chain stores are at the first position of revealed comparative advantage, followed by BBQ Chicken and Lotteria. In addition, when assessing the revealed comparative advantage of fast food chain stores in Hanoi, the importance of the evaluation criteria are ranked from top to bottom as follows: place store in central, brand stores, price, promotions, chain stores, beautiful shop space, comfortable seating, diversity of food, taste of food, the friendly store staff, quick service speed and ultimately many added value services.