With the rapid development of the smart grid technology and the advent of the big data era of informatization, data labels have become a new evaluation standard to measure the informatization level of the industry, which also have a great impact on the construction direction of industry informatization, automation, and intelligent system in the later stage. With the promotion of new technology, the power grid dispatching industry is also carrying out a new generation of digital reform around data and business. This paper proposes a construction method of regulation ontology label system suitable for the search application of power grid regulation micro scene, which starts with the power grid regulation micro scene, divides and automatically reorganizes the business scene of the power grid. On this basis, by creating corresponding regulatory ontology labels and corresponding label dimensions, it innovatively proposes the construction method of label library suitable for regulatory ontology, and puts forward the construction process of regulatory ontology label system with sharing, security, service, and statistics as the core. Finally, the rationality and correctness of the construction method are verified by the application of regulation ontology label system in power grid micro scene intelligent search.