In order to content the need of monitoring, a type of video camera system based on FPGA is designed. The video camera system uses CMOS image sensor which is controlled by the I 2 C controller in FPGA to obtain the image data. And then the system caches the image data into DDR2 SDRAM. The image is showed on LCD screen 53 frames per second finally. The result shows that the video camera system based on FPGA is flexible, transferable and high-speed.