As a contribution, this paper is aimed as 2 points mentioned bellowed: (1)To understand more clearly the development process of Structural Technique of wall and roof parts in Khmer brick architecture. (2)To clarify the Characteristics of Construction Technology, for example the weak point . cause of collapse, in order to contribute to the conservation and restoration work of Khmer cultural heritage. Based on investigation's results, this study makes it possible to contribute partly in reconsidering the chronology of Khmer historical architecture. The result of the development process of Structural Techniques and the Characteristics of Construction Technologies in Khmer brick architecture could be classified in to three periods of time. The last period from late 9th to late 10th century could be considered as the rational technology period of Khmer's Brick temple architecture.
