Taking the mainframe monitor system of the hydraulic wind turbine as the research object,in view of the communication problem between the mainframe monitor system and lower machine,a communication method based on the CIP (Common Industrial Protocol) was proposed for the mainframe monitor system of hydraulic wind turbine combined with EtherNet/IP communication principle.By using Microsoft Visual Studio development environment and C# language,the communication for the mainframe monitor system was realized.The test results show that:the communication method based on CIP protocol can be used to realize the communication for the mainframe monitor system of hydraulic wind generator,which is independent of any other communication software; compared with other communication methods,the communication method based on CIP protocol improves the communication efficiency,saves resources and reduces costs.It provides the communication foundation for the subsequent development of the complete monitor system of hydraulic wind turbine.