To meet modern complex control systems communication demands, my paper presents a multi channel UART controller based on FIFO (first in first out) and FPGA (field programmable gate array).The paper presents design method of asynchronous FIFO and structure of controller.This controller is designed with FIFO circuit block and UART (universal asynchronous teceiver transmitter) circuit block with in FPGA to implement communication in modern complex control systems quickly and effectively. This controller can be used to implement communication when master equipment and slaver equipment are set at different baud rate. It can also be used to reduce synchronization error between sub systems in asystem with several sub systems. The controller is reconfigurable and scalable. The whole scenario is simulated using VHDL coding.