The invention discloses a high-speed power line carrier remote upgrading method and a device, and the method comprises the steps: 1, controlling a main station to download a module program file, and sequentially downloading the module program file to a concentrator, a CCO at a module end, and an STA in sequence; 2, controlling the CCO to collect the upgrading result of the STA of the whole network, controlling the concentrator to regularly inquire the local upgrading state of the CCO and the collected upgrading result of the whole network, and controlling the main station to inquire the localupgrading result of the whole network of the concentrator so as to determine whether the upgrading succeeds according to the inquired upgrading result of the whole network; the device comprises a program downloading module and an upgrading result read-back module. According to the method, system-level remote autonomous upgrading from the main station to the concentrator and then to the module endcan be realized, and the method has the advantages of simple implementation method, low cost, high upgrading efficiency and success rate and the like.