In order to solve many inconveniences and contradictions such as low efficiency, slow diagram, many mistakes, difficult support and so on in the manual operation of live firing judgment, this paper designs and implements a set of real-time and accurate automatic evaluation system for firing practice. According to the functional requirements of the system, the overall design idea is put forward, the hardware environment of the system is built, the composition and function of the basic modules of the system software are defined, and the implementation approach is given. The test results show that the system design meets the application requirements and has strong feasibility, practicability and reliability.