The invention discloses an enterprise content management system and an enterprise content management method for nuclear power plants and solves the technical problems of low efficiency and high management and maintenance difficulty due to inconsistency of data exchange interfaces between each business system and a document system of the nuclear power plant in the prior art. The management sy6stem comprises a client (10), an enterprise document system (20) and a service platform (30), and the client (10) and the enterprise document system (20) are connected through the service platform (30) which is used for providing consistent standard interface services. On the basis of the standard interface services, the service platform (30) is capable of synchronously receiving a plurality of service requests sent by the business systems of the nuclear plant through the client (10), asynchronously processing the plurality of service requests and managing the enterprise document system (20). Consistency of data exchange between each business system and the document system is realized, intermediate links in data exchange between each business system and the document system are reduced, error probability is lowered, and data transmission efficiency is improved.