System for pure digital system, the entire factory floor and offices and factories such as monitoring the aisle totaling all the points of the video image input to the Digital Video Recorder host (www.95b2c.com), the host can be a digital hard drive video surveillance images focus on all management and control, the other through the network to reach remote management and monitoring functions, through the DVR Digital Video Recorder is authorized to implement a host of real-time monitoring of all images and video, followed by the central management control of the authorized sub-control function can be achieved , that any network can be the same on a computer monitor all the images. Sites ordinary type system based on color cameras and hidden cameras in order to combine and harmonize the environment, so that hidden beauty and environmental dissolved into one. Case occurs when the system can automatically switch to the alarm zone video screen, and start the VCR recording time, but also by the operator to easily switch the screen to track suspicious scene, and the merits of the video for use. System has improved communication interfaces, networking and other systems easy, scalable interface, and left side. Important places, can be installed alarm devices and alarm interlocks, alarm system can automatically start monitoring, automatically enter the video mode to enhance the effective prevention function.