With the development of economic globalization and political multi-polarization, the regional economic integration has become a great trend. Developing slowly of regional cooperation in northeast Asia reflects the great differences of culture identity. While the economic integration is developing vigorously worldwide, the northeast Asia falls behind. This situation not only means the economic interests contradictions of the regional countries, but also means that there is not a cultural identity in this area. If we want to prompt the region integration process we should strengthen the construction of the regional cultural identity. This paper analyzes the reasons of lacking of cultural identity in northeast Asia and point out the advantages and disadvantages of conutrcting northeast Asian cultural identity.