A conveyor system includes a splicing belt, a supporting member, a driving module, a trigger module, a detecting module. The splicing belt is attached to the first conveyor belt and the second conveyor belt for joining the second conveyor belt to the first conveyor belt. The supporting member supports the first conveyor belt and the second conveyor belt. The driving module drives the first conveyor belt to be moved relative to the supporting member. The trigger module is located between the supporting member and the first conveyor belt, and is triggered when the splicing belt is moved to be contacted with the trigger module. The detecting module records a trigger time when the trigger module is triggered, the trigger time is a material transition time at which the first materials being fed is changed to the second materials.