The invention aims to provide a method and a system for realizing the network management information transmission in an optical communication network. By adopting a technical scheme of the invention, the transmission of the network management information can be realized without using any hardware equipment, so the cost is saved and the complexity for maintaining the network is reduced. The method of the invention comprises the following steps of: generating service information according to the network management information or converting the network management information into the service information in at least one communication system, wherein the network management information is used for managing the at least one communication system; sending the service information by the fibre optical network; and receiving the service information and converting the service information into the network management information in at least another communication system, wherein the at least another communication system has an information processing structure similar to that of the at least one communication system.