Based on the difference of image gathering and the transmission, a new approach of data acquisi-tion is proposed, which takes the CMOS digital image sensor as the camera electro-optic transform component.The high-speed video gathering system is designed with FPGA as core control chip, USB as transmission inter-face; CMOSOV5620as image gathering chip.The system design structure was presented while each module hardware design method and the software flow were given.The test shows that this system is feasible.