First, the invention is effectively protected. The inventor applies for a patent for his invention, and the Patent Office opens the invention to the public in accordance with the law, grants the patent right, gives the inventor the exclusive right to his invention within a certain period of time, and legally protects the invention as a property right; Second, it can encourage citizens and legal persons to engage in the enthusiasm of invention and creation, give full play to the intelligence of the whole nation, and promote the rapid development of national science and technology; Third, it is conducive to the popularization and application of inventions, promoting the transformation of advanced science and technology into productive forces as soon as possible, and promoting the development of the national economy; Fourth, promoting the publicity and dissemination of invention technology to the whole society, avoiding repeated research and development of the same technology, is conducive to promoting the continuous development of science and technology.