City Ontology plays an important role in smart city management for data integration, reasoning decision support etc. With these managerial domain knowledge scattered among a large number of experts, researchers face a huge challenge constructing a complete ontology for city management. This paper presents a simple yet efficient method for non-computer science experts to construct an ontology. We use a middle part that acts as a transition layer called activity model which is later merged into

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... e city managerial ontology. We prove the effectiveness of this method by constructing a managerial ontology for two departments in Karamay's Smart City Program.