A method to detect high speed and parallel CCD control signals and to simulate sequential video signal outputs is presented to realize reasonable design and applications of a space optical remote sensing system with high-performance and multi-spectral TDI CCD image sensors.At the line readout and transfer period of 200 μs,48 clock drivers and 31 DC bias signals are analyzed and detected simultaneously.At the same time,the prepared image data are fastly transmitted from a disk array to a video image generator consisting of a FPAG,a D/A,an amplifier and a denoise circuit through the PCI-X and LVDS bus,so that the sequential and real-time outputs of diversified testing video images are realized.It is shown in experiments that three simulative chromatic video signals at a frequency of 6 MHz and eight simulative panchromatic video signals at a frequency of 12 MHz are generated synchronously with the reference voltage of a video signal of 8 V and amplitude ranges of 0~1.7 V and the valid sampling time and the signal stabilization can meet the requirements of the simulation and detection for the imaging circuits.