System for managing the deceleration of an aircraft on a runway on the ground enabling the control in real time of the position (X1, X2, X3, X4, X5, X6, X7, X8, X9) of the aircraft on a braking axis of the runway, comprising: - Braking means configured to brake the aircraft; - A calculator configured to: ∘ Calculate, from aircraft data and from external data comprising data on the state of the runway and meteorological data on the ground, a sequence of use of the braking means intended to brake the aircraft along the braking axis, over a predetermined braking distance associated with a predetermined braking duration comprising a plurality of braking instants each associated with a predetermined position (X1', X2', X3', X4', X5', X6', X7', X8', X9') on the braking axis, the sequence of use of the braking means being defined as an ordered series of use of the braking means comprising the activation/deactivation of the different braking means and their characteristics of use; ∘ Update in real time, the sequence of use as a function of the difference, along the braking axis, between the position of the aircraft and the predetermined position (X1', X2', X3', X4', X5', X6', X7', X8', X9') associated with a given braking instant, or the occurrence of a given event; - Control means configured to control the braking means as a function of the sequence of use or an instruction sent by a runway overrun alert system of the aircraft. - Braking means configured to brake the aircraft; - A calculator configured to: ∘ Calculate, from aircraft data and from external data comprising data on the state of the runway and meteorological data on the ground, a sequence of use of the braking means intended to brake the aircraft along the braking axis, over a predetermined braking distance associated with a predetermined braking duration comprising a plurality of braking instants each associated with a predetermined position (X1', X2', X3', X4', X5', X6', X7', X8', X9') on the braking axis, the sequence of use of the braking means being defined as an ordered series of use of the braking means comprising the activation/deactivation of the different braking means and their characteristics of use; ∘ Update in real time, the sequence of use as a function of the difference, along the braking axis, between the position of the aircraft and the predetermined position (X1', X2', X3', X4', X5', X6', X7', X8', X9') associated with a given braking instant, or the occurrence of a given event; ∘ Calculate, from aircraft data and from external data comprising data on the state of the runway and meteorological data on the ground, a sequence of use of the braking means intended to brake the aircraft along the braking axis, over a predetermined braking distance associated with a predetermined braking duration comprising a plurality of braking instants each associated with a predetermined position (X1', X2', X3', X4', X5', X6', X7', X8', X9') on the braking axis, the sequence of use of the braking means being defined as an ordered series of use of the braking means comprising the activation/deactivation of the different braking means and their characteristics of use; ∘ Update in real time, the sequence of use as a function of the difference, along the braking axis, between the position of the aircraft and the predetermined position (X1', X2', X3', X4', X5', X6', X7', X8', X9') associated with a given braking instant, or the occurrence of a given event; - Control means configured to control the braking means as a function of the sequence of use or an instruction sent by a runway overrun alert system of the aircraft.