A computer implemented data access system uses an SOAP-XML for use in an Internet web environment. The data access system includes a client, a web server, an EJB and service server and a gateway. The client requests a query language to receive a service request. The web server generates a SOAP-XML message and makes possible Internet web services by using DLL files if the SOAP-XML message is written by an ASP. The EJB and service server changes the SOAP-XML message to a DTD type SOAP-XML message if the SOAP-XML message is written by a JSP and, then, provides the DTD type SOAP-XML message to the client. The gateway requests the query language to a DB server; receives the result value for the service request; and provides the result value to the EJB and service server.