Abstract:Neixiang County Temple of Confucius was built in the eighth year of the Yuan Dynasty. Its main building, the Dacheng Hall, retains many architectural features of the song and Yuan Dynasties. It is an important reference for studying the remains of early architecture, at the same time, the architectural color paintings in the style of Central Plain are preserved on the beams, which is also an important material for studying the uniqueness of local color paintings. In this paper, we try to combine the scanning results of 3D point cloud scanning technology with the field investigation of indoor color painting, this paper discusses the cultural heritage value of the Dacheng Hall, the Main Hall of Temple of Confucius in Neixiang, Nanyang city.