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Heat-supply on-site work is the first-class danger point. How to strengthen on-site safety management and succeed in monitoring, early-warning, evaluating and control of hazard, becomes the issue that must be paid attention to on urban heat-supply work. In consideration of current situation of the enterprise heat-supply work, this paper presents a new on-site safety management process on heat supply on the basis of safety management theory. Then based on software engineering, we develop a heat-supply on-site safety management integrated system, which includes functional modules like on-site status monitoring module, on-site safety recording module and on-site safety analyzing module. By using the digital management method, the proposed system could significantly improve the level of monitoring and intelligent management on heating production process, and guarantee the efficient and close management of human, equipment and environment on heat-supply site. Thus it ensures a great improvement in safety management efficiency and quality as well.