With the extensive implementation of DevOps in major software enterprises, the version delivery and deployment of system software class products has been accelerated. In the process of implementation, it is found that the important part of the product, the product document, is still developed by traditional R&D method and lack of supporting processes and tools, which leads to the delay in the product document delivery comparing with the delivery of the software version, and which seriously affected the complete and just-in-time delivery of the product. The "Document DevOps" introduced in this paper is a continuous product document delivery mode. By analyzing the document delivery solutions of open source and DITA, and combining with the R&D characteristics of system software, a set of comprehensive document delivery solutions that is fit for system software has been summarized. With the concept of DevOps, and based on the DevOps tool chain of the industry, it has contracted a "Document DevOps Platform" (hereinafter referred to as the platform), to achieve a user-oriented document delivery solution. Its typical characteristics are:integration with software iteration process, information unit homologous citation, management of multi-format content sources, and protection of continuous integration quality. Zhongxing has achieved the simultaneous delivery of product documents and software versions by the "Document DevOps", which greatly improves the accuracy, integrity, and delivery efficiency of documents. The iDoc platform has been successfully applied in more than 50 software products. The problem solved by the "Document DevOps" is universal, helping the other system software to achieve agile value delivery in a wider range. Moreover, the "Document DevOps" is a supplement to DevOps, for it extends the application scope of DevOps:the delivery object covers product documentation, and the process extends to market planning, covering a broader range of collaborative personnel.