1. A method of equalizing load on stream media servers, wherein each server has its own private IP address, the method comprises the following steps of: a processing module of a client port, comprised in a load equalizer which is disposed before the stream media servers which are trusted by the load equalizer, intercepting a TCP request from a client with a first-class stream rule of a the client port and forwarding the TCP request to a main control module in the load equalizer to obtain the address of an actual destination server of the stream media servers, wherein the load equalizer is in charge of a public IP address; the main control module sending a Synchronize Number (SYN) packet sent from the client to the actual destination server; a processing module of a server port in the load equalizer intercepting a response sent from the actual destination server with a first-class stream rule of a the server port and forwarding the response to the main control module so that the actual destination server accomplishes a Synchronize Number (SYN) response; the main control module creating a second-class stream rule of the client port and a second-class stream rule of the server port respectively according to the address and Synchronize Number (SYN) information of the actual destination server and a serial number so as to establish a Real Time Stream Protocol (RTSP) control channel between the client port and the server port; and the main control module creating a third-class stream rule of the client port and a third-class stream rule of the server port respectively according to information of the control channel so as to establish a data channel between the client port and the server port , wherein each of the processing module of the client port, the main control module, and the processing module of the server port are stored in memory .