The conclusion of this paper is as follows. :1. In Long Duc Dien, the identification for wooden components was discovered on the pillar(Cot), the inclined beam (Kèo), the top crosspiece(Xà Dau Cot), the upper crosspiece(Xuyên Trúng), the big crosspiece(Xuyên) , the big crossbeam (Tren), the sleeper(Con Doi), the short pillar(Tru Doi), the small beam(Áp Qua), the roof beam(Dòn Tay), and the door(Cua Bang Khoa). 2. Chu Nom was used for the identification for wooden components, and that were written by indian-ink in a part of the roof beam, but the most character were carved. 3. In Long Duc Dien, “買”, “且”, “哉”, and “左辺” were new discoveries, though “䒑”, “彳”, “左”, “右”, “一”, “抌”, “回”, “决”, “中”, “次”, and “〓” had been reported up to now. 4. The method of identification for wooden components is that the space was separated to front and back, left and right to the building center, and “買” was used in the left and right side roof line, “回” was used in the front and back side roof line, and in the line of pillar and keo, the front and back sides are specified by “1” , and the east and west sides are specified by “抌” or “回”, and the corner lines are specified by “决”, and the corner sideward are specified by “且哉”. 5. The identification for wooden components of Long Duc Dien is provided essentially by a structural form, though it has implications in the assembly process on the character of it.