Abstract: The visualization of scientific computations of arch dam projects is an important component of arch dam studies.In view of the existing problems of conventional visualization methods, we propose an arch dam visualization method based on HTML 5 standards.Conventional finite element models are converted into WebGL codes by using the proposed methods for external surface extraction, topological transformation, and light rendering with the Blinn model.The visualization website has advantages in terms of platform compatibility, user experience, and development flexibility.This idea is applied to the construction of the Xiluodu arch dam.The browsing effect and user experience of different client platforms are satisfactory, thus verifying the feasibility of the proposed methods. Furthermore, the possible development trend of the visualization platform is discussed.