In order to strengthen the management and maintenance of the urban underground three-dimensional pipe network and reduce the leakage of the underground pipe network, the B/S framework and SSH2 framework are used in this paper to develop the monitoring and early warning system terminal of the underground three-dimensional pipe network, and the software and hardware systems of the remote monitoring and early warning system are designed to realize the remote monitoring and early warning functions of the underground three-dimensional pipe network. It can accurately monitor the operating conditions of the underground three-dimensional pipe network, timely find leakage points and fault points of underground three-dimensional pipe network and send warning signals to management personnel, which provides help for the management and maintenance of urban underground pipe network.