A server connection process method that can prevent network congestion is adopted for use on a server system which includes client ends, an Internet and a server host. The server host includes a dynamic port allocation module, a plurality of question and answer process units and a plurality of application service units. Each client end has a port preset selection unit to preset and automatically select an idle question and answer port in the dynamic port allocation module to form connection to the question and answer process unit to process requirement questions, then select an idle application port in the dynamic port allocation module to connect to a required application service unit to process required services. Through the dynamic port allocation module under TCP/IP, the invention allows the client end to have multiple ports for selection.