The present invention relates to a blast furnace bucket full net gas voltage equalizing method and system. The method includes as follows: transferring the net gas processed by cloth bag dust exhaustion to blast furnace top through a net gas pressure-equalizing device, wherein, the net gas pressure-equalizing device includes a net gas pipeline, one end of the net gas pipeline is connected to the export of the cloth bag dust remover, the other end is connected to the blast furnace bucket, and a gas sewage valve, a gas emission valve, a butterfly valve, a spectacle valve, a nitrogen purge valve, a bucket equalizing valve and a stop valve are provided in sequence on the net gas pipeline along the net gas transmission direction. The inventive voltage equalizing method has simple process, low cost, and the voltage equalizing equipment has a long term stable operation; the voltage equalizing system has simple structure, easy operation, easy mounting and maintenance, stable performance, longlife, and capability of achieving the recycling of gas, gas waste heat utilization as well as temperature improvement on the furnace top. The application of the present invention can effectively savethe production costs and enhance efficiency, realize economical use of resources, and have better social and economic benefits.