Provided is a device for storing a rule describing an event, a condition to be satisfied by the event, and an action to be executed when the condition is satisfied and executing the action of the rule in an expended structure for using web services so as to effectively process the web services in various devices as well as a computer. In addition, a global rule manager for inspecting the validity of the rule when the rule is stored and executed is provided. Accordingly, the web services can be effectively used in a ubiquitous environment.