Abstract: The BLM (Building Lifecycle Management) system owns characteristics of building information integration and whole process management, which is able to effectively improve the deficiencies of traditional building information management methods, thus avoiding the problems of information gaps and information islands in the communication among different project participants. Following the guidance of the BLM concept, this paper proposes architecture of the BLM system, and completes the development of the prototype system by integrating related technologies including ASP.NET, AJAX and WebGL. The main function modules are all described in details in the paper. The proposal and development of the system is aiming at solving the problems of information management and information sharing in the construction project, and providing ideas and methods for reference in following research and practice of BLM.