The invention discloses an electric car charging facility proportional allocation system and method. The electric car charging facility proportional allocation system comprises a local measurement and statistics unit and an integration system; the local measurement and statistics unit comprises a power measurement circuit, a transmission module, a mileage collecting wireless gateway and an ARM9 statistics and output circuit; the integration system is used for calculating the best allocation proportions of charging facilities in future network distribution areas. By means of the electric car charging facility proportional allocation system and method, the optimal aggregative indicator of a network distribution total load serves as a target, proportional allocations are carried out on different charging modes of an electric car, the best allocation proportions, corresponding to the different charging modes, of the charging facilities can be obtained in cooperation with capacity data of the charging facilities, the allocation system is accurate and good in efficiency, and the proportional allocations can be carried out according to actual conditions of different areas.