The international community&quots interest in ways to promote eco-friendliness is increasing. In the construction field, the ‘Green Building Certification System’ was implemented to induce ecofriendly construction. In addition, the construction industry recommends the use of BIM technology for the purpose of digitalization. The evaluation method of the green building certification system also needs to be digitized. Currently, the green building certification system is evaluated using 2D data. Therefore, this study was conducted to improve the certification method by using BIM data with building information. In particular, the method of evaluating the natural ground green space among the green building certification systems was studied. The ecological environment has become an important item for eco-friendly construction. An automated program was developed that can analyze the information required for evaluation, extract it from BIM data, compare it with the calculation criteria, and review it. Through the program, more accurate and faster evaluation than the existing evaluation method became possible.