A flight restriction setup system comprising: - a damage detection unit that is adapted to detect a damage which arose in a structure composing an aircraft; and - a flight restriction calculation unit that is adapted to set at least one flight restriction of the aircraft according to a degree of the damage detected by the damage detection unit, wherein the flight restriction calculation unit is adapted to calculate a permissible range of an internal load, which can apply on at least one member composing the structure after the damage arose, based on a position and a size of the damage detected by the damage detection unit, and set the at least one flight restriction based on the calculated permissible range of the internal load, wherein the flight restriction calculation unit is adapted to calculate a permissible range of an external load, which can apply on the structure after the damage arose, based on the permissible range of the internal load, and set the at least one flight restriction based on the calculated permissible range of the external load, and wherein the flight restriction calculation unit is adapted to calculate a permissible range of at least one of a distribution of shearing forces, a distribution of bending moments and a distribution of torques, as the permissible range of the external load. - a damage detection unit that is adapted to detect a damage which arose in a structure composing an aircraft; and - a flight restriction calculation unit that is adapted to set at least one flight restriction of the aircraft according to a degree of the damage detected by the damage detection unit, wherein the flight restriction calculation unit is adapted to calculate a permissible range of an internal load, which can apply on at least one member composing the structure after the damage arose, based on a position and a size of the damage detected by the damage detection unit, and set the at least one flight restriction based on the calculated permissible range of the internal load, wherein the flight restriction calculation unit is adapted to calculate a permissible range of an external load, which can apply on the structure after the damage arose, based on the permissible range of the internal load, and set the at least one flight restriction based on the calculated permissible range of the external load, and wherein the flight restriction calculation unit is adapted to calculate a permissible range of at least one of a distribution of shearing forces, a distribution of bending moments and a distribution of torques, as the permissible range of the external load. wherein the flight restriction calculation unit is adapted to calculate a permissible range of an internal load, which can apply on at least one member composing the structure after the damage arose, based on a position and a size of the damage detected by the damage detection unit, and set the at least one flight restriction based on the calculated permissible range of the internal load, wherein the flight restriction calculation unit is adapted to calculate a permissible range of an external load, which can apply on the structure after the damage arose, based on the permissible range of the internal load, and set the at least one flight restriction based on the calculated permissible range of the external load, and wherein the flight restriction calculation unit is adapted to calculate a permissible range of at least one of a distribution of shearing forces, a distribution of bending moments and a distribution of torques, as the permissible range of the external load.