This articles's purpose is to study the type of learning milieu of grammar education and its characters which constructed the didactical transposition of grammar knowledge. With citing the concept of didactical situation and adidactical situation which was first used by Brousseu. And then, I raised the importance of situation for knowledge construct and the problem of responsibility devolution. The core of this article is learning milieu of grammar education which divided into six milieu by two axis with reference grammar and paradigm. That is pure grammar exercise tradition, semi-reality exercise tradition, real-life exercise tradition, pure grammar investigation landscape, semi-reality investigation landscape, real-life investigation landscape. And then I described those's characters. The premise of construction of didactical situation in investigation landscape is three factor which are teachers, students, and problem learning milieu. Teacher's duty is devolution of responsibility in knowledge communication, organization of problem learning milieu, and management of knowledge's values. And student's duty is to produce free production by themselves and to delete premise of didactical situation and teacher's intentions.