Method for controlling damping force in an electronically-controlled suspension apparatus

A method for controlling damping force in an electronically-controlled suspension apparatus on the basis of a judgment reference value for judging a road surface during a vehicle driving time uses a comparison of the judgment reference value with a predetermined threshold value. And the road surface is judged according to a result of the comparison. Then, the damping force is controlled in response to the road surface judgment. The road surface judgment is maintained for a predetermined road surface judgment maintenance time.