A method for identifying metadata for cyber content sharing and governance (abbreviated as an MDCCSG method) and application method thereof. The MDCCSG method is proposed based on the requirements of big data sharing and governance under a big data and pan media environment, and is applicable for generating unified identifications on various categories of content resources; and the application method matched with the MDCCSG method can effectively support high-efficient sharing and governance of the big data, wherein the MDCCSG method comprises a unified description framework of metadata, a unified specification method of metadata, and a definition of the core MDCCSG identification element; and the MDCCSG method not only can describe rich semantics of contents in detail, but also has a built-in content trust authentication and security assurance ability.