This paper elaborates the fluence of the network congestion and the relation between resourse supply and demand, and analysises the reason for the network congestion and the method of how to judge the performance of the congestion control algorithm. An amelioration scheme is proposed through analysising and comparing all kinds of congestion control algorithm using in wire/wireless network at present, and point out the objection and the latest research progress. Finally, Optimal control theory is used into the network congestion according to the latest ...