There are some deficiencies in the quantitative analysis method of rotary ferrograph,such as low measurement efficiency and human error.A wear particles coverage rate measurement and analysis system was designed,which can realize the quantitative analysis of high efficiency and stability.By controlling the movement of the microscope stage,the system can obtain the wear particle coverage signal by photoelectric sensor,and complete the automatic collection,analysis and processing of the wear particle information by using software of LabVIEW.The experimental results show that the system has a high measurement accuracy and achieves the expected design goals.The efficiency of the measurement and analysis system is high,and it can meet the requirements of quantitative analysis of largebatch.