Abstract
The purpose of this paper is to study the converting drawings and specifications to BIM model toward the conservation of building stock. First, University of Tsukuba and design documents of its building are introduced. Next, the process of making BIM model and the data are explained. Finally, studying the record of BIM model in comparison with paper media is shown. Some results show as follows: (1) In BIM model, we can treat building and air-conditioning/plumbing simultaneously, which were edited separately in paper media. (2) To make BIM model precisely, we need to prepare lots of classes from the original.