Pre-payment electricity sales management system is programed with V C++ and Power Builder language, considering the situations of electricity supply administrator and the functions of pre-payment electricity meters. The system is secure and reliable, friendly operating and has a clear structure. It is an effective promotion of prepayment electricity meters. The system has many functions, such as programming, selecting, recording, demand resting, delete database, etc. There are two optional editions of the system: single-user system and multi-user system. It completely accords with the international standard IEC62053-21.