Disclosed is a composite service control system resolving a conflict. A triggering condition of a new application that requests a registration is determined. When the determined triggering condition overlaps with a triggering condition of an existing registered application, determinations are made whether an intersection between an explicit conflict set of the new application and an explicit conflict set of the existing application exists and whether an intersection between an implicit conflict set of an API of the new application and an implicit conflict set of an API of the existing application exists; andThe triggering condition and execution information of the existing application is reported. When either of the intersections exists, a defining of a conflict resolution policy or a changed application triggering condition for the new application is requested; otherwise the triggering condition and the execution information of the new application is stored in an information database.