The invention discloses a method for integrating a power equipment state monitoring device. The technical scheme is that: a seamless communication server consists of a communication interface, a protocol converter and an ACSI server, and an IEC 61850 client is directly connected with the ACSI server; and transmission and transformation state online monitoring devices in different types are accessed through the provided communication interface. In the method, a mapping rule is established between a traditional protocol and the IEC 61850 by a mapping rule editor; the protocol converter finishes protocol conversion between the traditional protocol and the IEC 61850 by using the mapping rule so as to realize the communication between different transmission and transformation state online monitoring devices and the ACSI server to realize communication between the different transmission and transformation state online monitoring devices and the IEC 61850 client. The method for integrating the power equipment state monitoring devices radically solves the problem that the conventional power grid state online monitoring devices are difficult for interoperation and information sharing, and can better meet the requirements of an intelligent power grid on panoramic state information monitoring.