The invention relates to an event ontology construction method. The method mainly comprises the following steps of (1) obtaining documents of related fields; (2) constructing a CEC corpus library; (3) by learning a corpus library, extracting events and event elements from a text; (4) extracting classification and non-classification relationships of event classes; (5) performing abstraction to obtain a formalized description language according to the event classes, event class elements and event class relationships obtained from a conclusion; and (6) realizing event ontology-based event classification relationship reasoning. According to the method, the defect that a conventional ontology difficultly expresses dynamic knowledge is overcome; static and dynamic knowledge can be expressed; the complexity of the non-classification relationship in the ontology is lowered; and effective support is provided for calculating text semanteme.