A server system has a blade system formed of a plurality of servers that are mounted in one or a plurality of stages within a single chassis so as to have a plurality of different functions, and a management server for managing said blade system. The management server has means for grouping the plurality of mounted servers to manage for each function, means for managing the deployment of the plurality of servers within the chassis, and deployment changing means for changing the functions of the plurality servers and transposing the functions to change the deployment of the servers within the chassis. Thus, the deployment changing means makes the servers of each of the plurality of functions be arrayed in regular order within the chassis.