1. An energy-saving or speed-increase control method for a hydraulic machine, the characteristics of which includes a control plan to adjust pressure or flow amount of said machine for energy-saving or production efficiency increase: setting up working conditions as in input to said machine; inspection of working conditions and operational processes of said machine; updating demands in control plan based on said inspected working conditions and operational processes of said hydraulic machine incorporating specific characteristics of individual elements in different working conditions and operational processes to coordinate with said control plan.