In view of the current hospital information management system has no bonus calculation, Combined with the hospital bonus calculation complexity and specificity characteristics, the solution to this problem needs the application of UML modeling technology design and development system. This paper analyses the object oriented modeling technology of UML, From the system development process perspective focuses on the UML modeling technology in requirement analysis and structure design of application, Proposed bonus accounting management system development the new thinking of the problem. According to the modeling of the use case diagram, activity diagram and sequence diagram to describe the system design framework, Class diagram reflects the attribute data objects and operation. Finally achieve a perfect function, Reliable performance bonus accounting management system in hospital.