Container door seal according to the present invention includes a main body that is formed to guide the locking hole and the through hole at the upper end and; Is installed so as to slide up and down along the guide hole in the main body, the locking member with the one end of the locking bar is inserted into the mechanical seal seals the hole in the container doors while retracting toward the outside of the locking hole is provided with; Fixed to be installed on the inside of the body release the fixed state of the locking member the locking bar is locked and fixed to the locking member when the hole is inserted into the inner side, the locking member end portion is projected outside of the body by a user's operation of the unit; Seal off the authentication unit that is installed on the main body to an external user mobile short-range communication module and the wireless communication; Inside the main body is installed such that a portion of the fixed unit and in contact with or spaced apart by the electrical energy, the sealed off when the seal off the authentication by the authentication unit is not carried out in contact with the fixing unit supporting the release of the fixing unit operations done so that when the fixed unit fixed and performs the authentication seal off the fixed unit and the holding unit are spaced apart allowing the release of the fixed unit and the work; Seal sensing unit for sensing a locking and an open state by a locking member in accordance with the vertical movement of the locking member; It characterized in that it includes a telecommunications module for wireless communication with the lock and open state sensed by the sensing unit sealed to the external security management server.