Network accounting management is the important management function of commercialized computer network. With the commercialization of Internet and the occurrence of lots of Intranets, it's urgent to develop network accounting management system. A principal requirement of such systems is efficiency and reliability. A fault-tolerant accounting system based on RPC (remote procedure call) mechanism——FTCharge(fault-tolerant charge) is proposed in this paper. After the brief discussion of the accounting principle, the design of the architecture and the fault-tolerance mechanism of FTCharge system are discussed.