In the last decades, the mobile devices had an astonishing growth rate and the smart phones became more and more popular throughout the world, it is significant to introduce more mobile applications into AEC industry in order to build an efficient way of communicating between owners, designers, constructors and other persons.This paper presents a mobile application which is designed to view architecture model, structure model or MEP model in 3D format, view project information and documentation and send feedback in text, image, sound or video format.While the transmission speed of the large-scale 3D-models in a limited band width is the major problem to be solved to satisfy the practical application requirements.Based on the authors' studying and development practice, the solutions were obtained which are presented in this paper, such as user interaction, display optimization technology and cross-platform technology.