Abstract:This article introduced the intelligent test instrument with the core of AVR-ATMEGA329 that is for the debug of the control filed in electric actuators, quality inspection and the judge of the basic performance. The instrument can be connected to an object to be detected correctly, the switch, the electric actuator control module on the market in general adjustment can be done debugging, function and performance test. This paper introduces the design scheme, the system modules, system reliability test. The results show that, the system has the advantages of simple operation, good visibility, stable operation, reliable, can meet the technical requirement.