The utility model provides a multichannel repeater system of magnanimity monitor message, the system includes: including monitoring host, multiple -input -multiple -output information exchange functional module, USB conversion module, display device, 2 input device, the multiple -input -multiple -output information exchange functional module passes through the net twine to be connected with monitoring host, through 485 connections and serial port communication line and controlled device or instrument connecting, monitoring host respectively with USB conversion module, display device input device with the multiple -input -multiple -output information exchange functional module is connected. This system has made things convenient for by the measure and control instrument, itself working a telephone switchboard and having reduced equipment configuration quantity, the operating is simplified degree of difficulty when having simplified extensive battery energy storage power station monitoring to the messenger scene is cleaner and tidier.