The invention provides a portable radar perimeter security and protection system. The portable radar perimeter security and protection system comprises radars, first control boxes, a numerical control linkage dome camera, a second control box, a server, a displayer of the server, a switch, a monitoring video display device and an alarm device. The server, the numerical control linkage dome camera, the wireless equipment, the radars, the monitoring video display device and the alarm device are connected by the wireless network. The server is equipped with the portable perimeter security and protection system software; the core of the software is the control of 3D linkage of the radars and the numerical control linkage dome camera; the algorithm adopted by the linkage control is presetting the space coordinates of the left, center and right 3 points of the radars and the numerical control linkage dome camera, and the input data is the target location detected by the radars, and the calculating result which is calculated according to trigonometric function is the PTZ 3D coordinate of the numerical control linkage dome camera. The first control boxes are used for supplying power to the radars, and the second control box is used for supplying power to the numerical control linkage dome camera. The switch provides the connection ports for a plurality of cables, used for connecting the server, the monitoring video display device, and the numerical control linkage dome camera; and the switch adopts star topology and realizes the data exchange among the devices in the network.