A computer managing method includes the following steps. Firstly, a blade server system with M blade server units, which includes a number of server blades and a modular management blade (MMB), is provided, wherein the M MMBs are connected with each other via network paths and M is a natural number greater than 1. Then a master MMB among the M MMBs are selected in response to first user operation event. Next, the network parameter data of the master MMB are set in response to second user operation event. Then network topology of the master MMB and the rest of M−1 MMBs are obtained via the master MMB. After that, the rest of M−1 MMBs are driven for utilizing a network protocol service so that the M−1 MMBs are able to receive network parameter data from the master MMB and carry out parameter setting accordingly.