In order to improve the real-time performance and reliability, in researching and developing display and control terminal of certain type flack fire-power control system, transplant μC/OS-II inner core into C8051045 hardware platform. Analyze the application of μC/OS-II system in C8051045, put forward the system testing steps, research and develop μC/OS-II system based on C8051045 single chip. The system is successfully used in display and control terminal design of certain type flack fire-power control system. It can satisfy the real-time requirements under multi-task, and make the system more stable and reliable.