A desktop four ball friction and wear tester was developed by optimizing the structure of four ball friction and wear tester, because of its large and bulky body and expensive cost. The size of the desktop four ball friction and wear tester is 540 mm×360 mm×800 mm, and the weight is 150 kg, they are reduced by about 50% and 75% separately compared with the size and weight of domestic computer control of four ball friction and wear tester. Under the condition of equal size fuselage and accuracy, the load force is break through to 10kN. Based on the measurement and control software of LabVIEW, the servo motor control and real time data collecting, processing, analysis, display, store and report generating are realized. The tests show that the tester has high degree of precision, and it can effectively simulate the friction and wear process in the actual working condition.