Method for serving search content by a soap operation

A method for serving inquiry content by a soap operation is provided to serve accurate and various results of contents inquiry by sorting and grouping the questioned contents when requesting the contents inquiry. A request message for an SOAP inquiry operation to which a request element field type is added is transmitted in order to request the various contents searches based on a complex operation. In case that the request message has a request element field type which designates a result value of inquiry request, an inquiry result expression value which corresponds to a table field designated at the request field type element is extracted. In addition, the expression value of the inquiry is added to an inquiry result element and the inquiry result element is transmitted through a response message of the SOAP operation. The response message sorts and groups the inquiry results depending on the requested contents.