The algorithm of angular error compensation of transmitter in remote terminal unit was introduced and the angular error compensation of transmitter was easily realized by using inter integrated circuit ( I ~ 2C ) bus technology in the paper. 介绍了远动终端(RTU&RemoteTerminalUnit)中变送器角差补偿算法,并应用I2C(InterIntegratedCircuit)总线技术方便的实现变送器角差的补偿。