A method and system for managing an alarm of an outsourced part and a method for managing configuration information of an outsourced part are provided, so as to solve the problem in the prior art that the maintenance operation in a Business Operation Support System (BOSS) for the alarm function of the outsourced part is complex. The method for managing configuration information of an outsourced part is applied to a system for managing an alarm of an outsourced part, and the system comprises a client side and a server side. The method comprises: the client side receives a request of a user for operating configuration information of the outsourced part; the client side performs a corresponding operation on the configuration information of the outsourced part that the client side stores according to the request for the operation, and sends an operation result to the server side according to the type of the operation; and the server side performs an update processing on the configuration information of the outsourced part that the server side stores according to the operation result. With the technical is solution of the present invention, the maintenance operation of the BOSS on the alarm function of the outsourced part could be simplified.