At present, there are few teaching oriented systems in architecture simulation system， which are the limitation of architecture teaching. By taking beam, pillar and board which are the three basic components of architecture as the main body，the procedure of realizing Threedimensional Examining system for simulation teaching is illustrated detailedly in this paper. The subject entry, answer generation and coordinate calculation of Threedimensional simulation of Examining system can be realized by modeling beams, columns, plates, and internal reinforcement, etc. into classes based on objectoriented thinking, and setting and computating the parameters of building elements and reinforcements in the classes. The system is an effective approach to examining the mastery of basic knowledge about beams, pillars, boards, etc. of beginners majored in Architecture.