Abstract:Based on the requirements of project planning management, in order to solve the problem of how to build a reasonable planning system at the beginning of a project, this paper proposes a TOE 3D-Model from three dimensions of time, object, and element, by referring to the Hall"s three-dimensional structure model. Based on this model, a complete analysis method is developed. Then, combined with a case of a major scientific engineering project, the application analysis was carried out, and the construction process of the planning system was elaborated in detail. The method has strong universality, and its output can achieve the plan coverage of all aspects and all elements, and meet the requirements of the project at all levels. This method is worthy of peer analysis.