Taking amounts of tests to camera comprehensive management unit is one important segment in aerospace optical camera development. Traditional test system has disadvantages for its single function and lacking of ability to simulate the whole working schedule within on-orbit flight. This paper goes from actual testing angle and put forward a method of establishing new kind of simulation orbit test platform for aerospace optical camera, which is based on DSP hardware and VC software for telemetry and remote control. Then it introduces hardware components and working principles of this platform. Meanwhile, critical software reference codes are provided. Through detailed test in an aerospace camera, it shows that this platform can simulate data stream in arbitrary moment of camera comprehensive management unit during on-orbit flight. And it can record remote measuring parameters in testing process. These functions demonstrate that it can validate the function and performance of camera comprehensive management unit, which achieves the objective of aerospace camera ground test and possesses practical application value in projects.