Abstract: According to the simulation testing requirements of shipboard EO tracker, a design of optoelectronic simulator based on the infrared image simulation was presented. By using the Vega simulation platform, the linear relationship between the radiance and the gray value of simulation image was calculated , then the linear map was solved and the infrared simulation scene image was analyzed and calibrated. The type test by a photoelectric tracker verified that the tracking precision reached 1 mrad, which satisfied the system demand. The EO simulator could test the dynamic performance, tactical and technical index of EO tracker under comprehensive background and night environment.