This paper deals with the necessity and tasks of “the third field” of the support and care of children and young people for their transition from family and school to a job place or the society and their independence. The main results are as follows. (1) “The third field” has the tasks such as the creation of some types of free spaces with animation for young people to carry out their independence. (2) The independence has five dimensions:developmental, economic,cultural, social and political. Five dimensions of independence goes to the goal of mental independence.(3) The idea of five dimensions of independence contributes to the construction of a framework of the support and care of children and young people, and the definition and placement of the youth work and youth social work.