Considering the maintenance problems of the certain type airborne Ni-Cd battery, such as high maintenance conditions and difficulties, an intelligent battery charge and discharge manager with easy operability and high reliability is proposed. The hardware and software of the system are both designed. The electrical isolation and condition monitoring technologies are mainly adopted in the hardware design. The smooth filtering and tolerant design technologies are mainly adopted in the software design. The system is tested and carried out application analysis. The analysis results show that the system has some functions, including battery charge, battery discharge, battery maintenance, battery training and so on. This battery charge and discharge manager has been tested for 6 months, and all functions can be realized.