Standard gain antenna is generally used in radar measurement as its accurate gain and portable characteristic. The tradition method of setting antenna up is adjusting antenna position artificially according to the indicating value of the instrument,then finds out the maximum signal position and fixes the antenna. The defect is personnel’s suffering radiation with low efficiency and accuracy. This article design and implements smart servo system for standard gain antenna by hardware integration and software optimize. It realized the servo system more quickly and accurately setting standard gain antenna up,avoiding suffering radiation and raised the test efficiency and percent of accuracy.