A method and system for semantic services for registering and managing semantic services by collecting the semantic services distributed among a plurality of service servers, and combining the plurality of semantic services to be matched with a condition set by a user are provided. The system includes a semantic service management server which registers, deletes, and edits the ontology and ontology-based semantic service information, and supports an information searching function performed by a semantic broker server; the semantic broker server which searches and combines semantic services through the semantic service management server, and provides the results with one of the combined semantic services or semantic workflows; and a semantic service license server which requests the results by transmitting the corresponding condition to the semantic broker server when the user inputs the condition as well as an input factor according to the preset items, and receives and outputs the corresponding results.