Method for controlling idle speed and power draw, said power being generated by at least one engine of an aircraft, characterized in that it includes the following successive steps: - a first determination step implemented by a first determination unit, that involves determining at least one current available power value using data on current power draw capacities from said at least one engine of the aircraft and from at least one auxiliary power source, - a second determination step, implemented by a second determination unit, that involves determining at least one current power consumption value using current power data representing the power requirements of at least one consumer system of the aircraft, - a third determination step, implemented by a third determination unit, that involves determining at least one future power requirement variation value, using power data estimated by said at least one consumer system and said current power data, said estimated power data representing the future power requirements of said at least one consumer system, - a first computation step, implemented by a first computation unit, that involves calculating at least one future estimated total power requirement value using said at least one current power consumption value and said at least one power requirement variation value, - a second computation step, implemented by a second computation unit, that involves calculating at least one future estimated available power value on the basis of said at least one current available power value, at least one future estimated pneumatic draw value and as a function of at least one estimate criterion, - an optimization step, implemented by an optimization unit, that involves determining an optimization result by comparing said at least one estimated total power requirement value with at least one power value associated with at least one optimization criterion, and - a control step, implemented by a control unit, that involves issuing an adaptation order of an idle speed of said at least one engine, an adaptation order for the future estimated total power requirement or no order as a function of the optimization result. - a first determination step implemented by a first determination unit, that involves determining at least one current available power value using data on current power draw capacities from said at least one engine of the aircraft and from at least one auxiliary power source, - a second determination step, implemented by a second determination unit, that involves determining at least one current power consumption value using current power data representing the power requirements of at least one consumer system of the aircraft, - a third determination step, implemented by a third determination unit, that involves determining at least one future power requirement variation value, using power data estimated by said at least one consumer system and said current power data, said estimated power data representing the future power requirements of said at least one consumer system, - a first computation step, implemented by a first computation unit, that involves calculating at least one future estimated total power requirement value using said at least one current power consumption value and said at least one power requirement variation value, - a second computation step, implemented by a second computation unit, that involves calculating at least one future estimated available power value on the basis of said at least one current available power value, at least one future estimated pneumatic draw value and as a function of at least one estimate criterion, - an optimization step, implemented by an optimization unit, that involves determining an optimization result by comparing said at least one estimated total power requirement value with at least one power value associated with at least one optimization criterion, and - a control step, implemented by a control unit, that involves issuing an adaptation order of an idle speed of said at least one engine, an adaptation order for the future estimated total power requirement or no order as a function of the optimization result.