With the  improvement of  modernization in   manufacturing and life as well as the development of the technology of computer and communication, auto recording and charge settlement for the consumption of electric power has become a definite trend. Achieving auto-recording and auto-calculating to the end-users of electricity in wide areas within the range under  domination of electric power  bureau may  improve the efficiency and accuracy in charging period, facilitate computerization administration in forming various of  statistics   sheets and  printed receipts. The system of long- distance auto-recording and charge settlement for electric power developed by our company make use of the existing public telephone and switching network, can achieve the above functions. Its practicability, reliability and low cost enable them to be popularized to application in every big city.