The invention provides a method for constructing a required-interface oriented cloud computing searching system, which is characterized by comprising the steps of: searching N executable event functions as an output object, wherein the executable event functions are used as a call interface requiring computing service in a first layer, and calling through a required interface; and realizing required interface event function drive search on a second layer to realize special cloud computing required service which has multiple forms, for example, driving a special demand oriented search service and driving a special target oriented analysis computing service. The invention develops a novel demand management method and a commercial operation mode of the cloud computing search service for establishing and maintaining the function and the content of the required interface.