The invention relates to a video monitoring system key technology based on an ARM processor. According to the invention, the technologies of an embedded system, graph acquisition, image processing, image transmission and the like are applied, the ARM processor and the peripheral equipment are used for building a signal processing unit, a hardware circuit of a data pushing unit is designed, and a development environment needed by a Camera data pushing unit is built to push the processed image signals to a Qt application of a Linux terminal to be displayed. According to the designed system, thestability is improved, and certain practical significance is achieved.