A computer-based method for requesting a Web service from a network server is disclosed. The method includes the steps of: receiving a service request from a user computer; invoking a corresponding Web service from a network server; determining whether the Web service is accessible in the network server; loading configuration information of the Web service if the Web service is accessible; generating a simple object access protocol (SOAP) request according to the configuration information, and sending the SOAP request to the network server for process; collecting response information of the network server, generating processing results, creating an instance of a user-defined class, assigning the processing results to variables in the instance of the class, and returning values of the variables to a business server. A related system is also disclosed.