The invention provides a component-based universal relay device for operating state monitoring data of main electrical equipment, belongs to the technical fields of data relay devices and mainly solves the problem about poor universality in the prior art. The component-based universal relay device for operating state monitoring data of the main electrical equipment is characterized in that a wired data input module (10) comprising an interface RS232 (1), an interface RS485 (2), a twisted-pair interface (3) and an optical fiber interface (4), a wireless data input module (10) comprising a radio frequency wireless data input interface (5), a wired data communication module (13) comprising an interface RS232, an interface RS485 and an optical fiber interface, a wireless data communication module (12) comprising a GPRS (general packet radio service) interface (7), and a power source module (6) comprising a 220V alternating-current input interface, a 12V direct-current input interface, a 24V direct-current input interface and a storage battery interface are combined together, and the component-based universal relay device is provided with a data preprocessing module (8) and a device management module (9).