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The image-forming optic-mechanical device has used more new technology, the evaluation and test of which is also an important subject, and conventional test system is always adapted on itself and hasn’t general purpose. Under this background, the universal testing platform of optic-mechanical device is designed. According to universal design method, a signal processing unit is designed in hardware of the platform which transforms the output signals of optic-mechanical device into standard electrical and physical interface, and makes the signals can be acquired directly by universal integrated cards. Software of the platform is designed as hierarchical structure of base level, logical level and display level, and for different model of device only the display level need readjustment. The platform has already satisfied test demands of multi-mode optic-mechanical devices and provided good performance on stability of acquisition, real time character, sampling rate and precision, and the software of the platform has brevity structure and high handling data. The problem of test of image-forming optic-mechanical device and the universal requirement is solved by this method, which has good performance commonality and extensibility.