Embodiments of the present invention provide a scheduling implementation method, apparatus, and system. The method includes: according to a processing delay and user priority information of a user processing request, determining a priority to which the user processing request currently belongs; if the user processing request is not recorded in a priority queue corresponding to the priority to which the user processing request currently belongs, writing the user processing request into the priority queue corresponding to the priority to which the user processing request currently belongs; and in a situation that a processing apparatus is in an idle state, reading a user processing request in a non-empty priority queue with a highest priority, and if the user processing request with the highest priority does not time out, sending the user processing request with the highest priority to the processing apparatus.