A sterilization system includes a sterilizing device having a nozzle (10) to spray sterilizing agent (70) onto a sterilization object (80) and a conveying unit (90) conveying a plurality of sterilization objects (80) one after another continuously to the sterilizing device. The nozzle (10) is capable of moving a reaching position of the sterilizing agent (70) sprayed therefrom to the conveying unit (90) along a conveying path (91) of the sterilization objects (80). A controlling unit is provided for executing a following control which causes the reaching position to follow each sterilization object (80) as being conveyed by synchronizing a moving speed of the reaching position of the sterilizing agent (70) with a conveying speed of the sterilization object (80).