BIM is an opportunity to implement construction IT. BIM has brought two changes. One is the change of geometric Information. It is the transition from 2D CAD to 3D model. The other is property changes. Requires conversion from data to information. This is a confergence of geometric information and attribute information, and BIM requires convergence in the construction work process. This study aims to present a method for activating BIM in Project management. The first task after the design is quantity take-off. The QTO is a process of converting the geometric information (Analog) into the attribute information (Digital). This QTO-database is important information that can be based on Project management. Therefore, it is necessary to construct information that is useful from QTO. It is WBS-CBS integrated information. BIM-based QTO refers to linkage between 3D model object and WBS-CBS. Through this study, we show the method of WBS-CBS integrated information based on BIM and show the applicability of BIM through actual case. This study is expected to be a basis for the successful implementation of BIM-based project management.