A cascaded management system and end-to-end route choosing method, sets a number of network management systems (NMS) and cascaded network management system (CNMS), NMS is used to manage one sub-network, CNMS manages one network through NMS; the stated method includes the following steps: A. CNMS confirms the public node distribution and sends calculation request to each NMS; B. each NMS calculatesits own network's public node shortest distance matrix; C. CNMS has a summary of the shortest distance matrix that each NMS returns and forms entire network equivalent map, then calculates the shortest distance and shortest equivalent routing between the entire network equivalent map starting points and finishing points; D. each NMS calculates equivalent linking actual shortest routing of its ownnetwork adjacent nodes. This method can greatly reduce upper and lower network system data transmission overhead, because the distance matrix structure operation by k sub-networks can parallel , thismethod can save the calculating time.