An UHV converter station engineering controlling capability improvement method based on BIM-5D technology is proposed. On the overall framework of BIM-5D system, construction schedule and cost management control early warning model are established by using multiple adaptive least square curve fitting and segmented warning methods. The earned value method was used to correct the parameters of the early warning model and set the warning threshold range, and the final UHV converter station engineering control system was obtained. The construction schedule and cost management of UHV converter station project are analyzed with specific cases, and the corresponding application scenarios are obtained. The case analysis results show that the engineering controlling system of UHV converter station based on BIM-5D technology can effectively control the construction schedule and cost management.