The counting function is commonly used in the industrial production. Recently, we are requested to add the counting function to a number of resistance sorters being used by a factory. The improved resistance sorter can help the management of the factory compute the workload of workers. After test the resistance sorter, we decide to design a counting system which consists of a signal acquisition circuit and a electronic counter. Statistics the number of resistors with the counting system is fast and reliable. It’s better than artificial statistical methods. The counting system which has a simple structure and a small size is easy to operate. The resistance sorter with the counting system meets the factory’s requirements.