Design concept of performance test equipment for servo-valve consists of mechanical and electronic systems. The mechanical parts includes a hydraulic power pack equipped with safety and monitoring of pressure and flow-rate, servo-valve and its base-plate, flow-meter for monitoring flow-rate in A and B ports. The electronic system parts includes a signal generator to the servo- valve, output signal from flow meter A and B ports, acquisition for signal output flow-meter, hardware and software computer. The form of graph Input Signal (m- Ampere) versus Output Signal (LPM) can help analyze to determine servo-valve performance, that are accuracy and detect damage which can be taken for further maintenance and repair.