The invention discloses an equipment knowledge base construction method based on digital and intelligent application. The method comprises the following steps: 1, ; five key fields of an asset structure, a fault mode, a fault reason, a maintenance strategy and a health index description fault or defect are distributed in an asset structure library, a fault mode library, a maintenance strategy library and a health index library, and an equipment knowledge base is constructed; by analyzing the internal logic among different fields, the incidence relation among the fields is established, four standard libraries are established, and an equipment knowledge base is constructed. According to the method, the solving efficiency can be improved, the labor cost is reduced, Meanwhile, an enterprise isassisted to formulate a maintenance strategy better conforming to the enterprise and gradually form a knowledge base.