Aimed at the MCU’s choice scope is very narrow when using traditional LED panels display complex interface, introduced LED matrix connection method with ULN2003A[1] as the LED cathode current amplifier, and KID65783AP[2] as the anode current amplifier. Proposed three kinds of scanning mode including line scanning、row scanning and full scanning. Give the main routine flow diagram, interrupt service routine flow diagram and its program lists. The practice result proved that, this design greatly reduced the output port numbers which needs, reduced the design cost, and massive used in the LED panels designing of air-conditioner controllers.