This was primarily due to the many features of wooden space not only soothe people who desire natural, healthy, and warmth, but also to satisfied the human\'s necessary of the sustainable development strategy because of resource shortages.

In the constitution of backtracking algorithm, the solution space tree has the massive redundant solutions.

A 6-DOF spatial model based on spatial tree was proposed according to the attach relations between spatial nodes.

Since tree space has many characteristics such as clear layers relation,extensive system,multiple located style,new technology norm and easy realization,complex knowledge system is mapped on it to build study flow model.