Quick and accurate measuring and weighing of continuously conveyed materials (especially granular bulk materials) is necessary in industrial and agricultural production, warehousing, product flows and other areas. Traditional weighing system, with poor accuracy and slow running, cannot meet the demands of fast weighing and accurate measurement. The proposed system is based on dynamic weighing method, using dynamic switch of materials flow and double weighing bucket mutual preparation buffer measurement. It avoids the traditional defects, and the measurement precision is more than 0.5%. It can be used in such areas as trade settlement, enterprise bulk materials storage and removal, and measurement between adjacent processes. The system can replace traditional belt scale or nuclear scale, with strong anti interference capacity and faster response speed.