This paper analyzes 1) the premise and perspective of and integration and studies the possibility and limit of that integration. The papers about integration of and show the characteristics as follows. The reason of integration ① for practicality and usefulness of grammar ② for the practical instruction about language activity The method of integration ① use grammar as the knowledge of language activity. ② use text as the central axis of integration But teaching grammar with language activity as the central figure don’t have always educational effects. Likewise the education about language activity based on grammar don’t have always educational efficiency. So, the integration of and must be worked based on ‘Sindokjaron’.