Abstract: To improve the service robot's accurate acquisition and cognition of the semantic information of things in the home environment, a construction method of the knowledge graph of the home service robot is proposed, and the application test of the home service is carried out. First, a domain ontology suitable for the home environment is constructed according to the application requirements of home services, and a tructured method is used to represent the semantic attributes of objects and the knowledge of environment, users, and services in the home scenario, and store them in a relational database. On this basis, according to the domain ontology, the mapping and knowledge extraction are performed on the structured data of the knowledge base to complete the construction of the knowledge graph, and the application requirements of typical home services are tested. The experimental results show that the constructed knowledge graph can effectively help the service robot to accurately obtain the semantic information of things in the home environment and retrieve the knowledge required for the service so as to ensure the intelligent execution of the home service.

Key words: home environment, domain ontology, relational database, knowledge Graph, home service