The invention aims to solve the problems in the prior art, and finds a distributed real-time database system capable of unplugging a network cable by means of a controller. The distributed real-time database system comprises a distributed node management server and a plurality of data servers, wherein each data server comprises a host, the host is provided with an RJ45 interface, the RJ45 interface is plugged with an RJ45 network plug, and the RJ45 network plug comprises a network plug main body to be connected with a cable, a groove body formed in the upper part of the network plug main body and an elastic sheet arranged at the lower part of the network plug main body; each host is further provided with a plugging and unplugging device for plugging and unplugging the RJ45 network plug; and each plugging and unplugging device comprises a first cylinder, a second cylinder, a fixing device used for fixing the first cylinder, and a controller used for controlling actions of the first cylinder and the second cylinder. The distributed real-time database system has the beneficial effects that the controller can control the second cylinder to control a second piston rod to extend and further compress the elastic sheet of the network plug, and can control the first cylinder to control a first piston rod to retract so as to pull the network plug out by means of a lug on the first piston rod.