The invention discloses a service dispatching method and system and a local service dispatching server. The method comprises the steps that the service dispatching server of a local node receives a dispatching service request; whether the local node stores the request content or not is judged; if the local node stores the request content, whether loads of streaming servers, in activated states, in the local node reach a set threshold value or not is judged; if the loads reach the threshold value, one streaming server in the dormant state is awakened; the adopted storage mode is judged; if external storage is adopted, the service request is dispatched to the streaming server with the largest load smaller than the set threshold value; if internal storage is adopted, the service request is dispatched to the streaming server storing the request content, wherein the load of the streaming server is smaller than the set threshold value and is the largest; whether the streaming servers, in the activated states, in the local node meet sleeping conditions or not is judged; if yes, sleeping instructions are sent to the corresponding streaming servers. The utilization rate of the streaming servers in the local node is improved.