1. High-tech service industry in the scientific field to which the project belongs mdash; high-tech professional services mdash; high-tech professional services. 2. Main technical innovation content and characteristics At present, the restoration of historical building carvings is often two-dimensional and planar, while the restoration process is extensive. The final effect depends entirely on the workers 'craftsmanship. There is no guarantee that all repairs are scientific, rigorous and accurate. Many restoration processes of carvings are actually a process of man-made destruction. The 3D historical building carving restoration technology researched by our company can effectively solve the problems existing in carving restoration at this stage and realize scientific and refined operations of carving restoration. The study adopts effective calculation methods to achieve computer simulation restoration of three-dimensional computer models; during the process, the details of the three-dimensional model of the restored carvings must be studied, and comparisons of the same type of carvings must be made. In addition, experienced technical craftsmen and cultural relics protection experts conduct argumentation to ensure that the restoration is still sufficient. Based on the research results, technical standards for 3D restoration of different carvings are established to ensure the rationality of restoration. This project provides a new method for restoring historical building carvings. Through the use of 3D technology, the restoration of historical building carvings is made more scientific, rigorous and accurate. At the same time, by saving the three-dimensional data of the carvings to be repaired, the state of the carvings before repair can be truly recorded to avoid irreparable damage caused by work errors or improper operation during the repair process. 3. Application and promotion This project better solves the maintenance and repair problems of historical building carvings through scientific and advanced maintenance and repair construction technical means, so that they can continue the original history and appearance of the building, expand functions that adapt to the needs of society in the new era, and achieve The effect of repairing the old as old, decorating the new and dissolving the old activates its commercial economic value. This project has currently been authorized for 5 invention patents. Since the completion of research and development in 2016, it has been applied many times. It not only improves the company's profitability and creates good economic benefits, but also effectively improves the management and protection level of the cultural heritage industry. It has been unanimously praised by cultural relics units.