The invention discloses an end-to-end online research and development management system and method based on DevOps, and the system comprises the following parts: a research and operation integrated platform portal which is used as an entrance of a project research and development team, is used for the access of to-be-managed projects and data display, and provides a unified research and development and operation integrated service; a research and operation integrated management platform that is used for unified platformization and closed-loop management of project requirements, development testing, deployment and operation and project operation; and an research and operation integrated operation and maintenance platform that is used for basic management of the platform portal and the management platform, wherein management objects comprise projects, environments, integrated tools, workflows, Pipeline tasks, users and role authorities. According to the technical scheme of the invention,an end-to-end delivery assembly line of a project is built to promote the fine management of project research and development. According to the invention, optimization is carried out on processes ofdifferent levels, research and development processes tend to be fused, IT internal research and development is promoted to be light in weight, online, automatic and visual, team maturity is improved,and the service requirements for higher speed, higher quality and higher user experience are met.