The study is to develop a computer program that can input the design informations of the typical floor plan, and the program can establish floor plan database, draw floor plans、vertical plans and three-dimensional plan, and calculate the amount of concrete and moldboard of each structural component of every floor plan. In the past, Constructor bid a RC building project to calculate the amount of concrete and moldboard by labor work. The presented software can alleviate mixed work through the study, and the study makes constructor comprehend the amount of concrete and moldboard under the control of budget and schedule.