Information extraction and knowledge graph construction system and method

The invention discloses an information extraction and knowledge graph construction system and method, belongs to the technical field of data processing, and aims to solve the technical problems of how to improve the accuracy and integrity of information extraction and how to efficiently and accurately construct a knowledge graph. Comprising a data preprocessing module used for providing word segmentation service, part-of-speech tagging service and syntactic analysis service; the entity identification module is used for providing an entity feature extraction service and an entity label prediction service; the event extraction module is used for providing an event feature extraction service, an event template matching service, an event classification and extraction service and an event relation modeling service; the knowledge graph construction module is used for providing a data model definition service, a data storage service, a data update import service and a visual interaction service; and the knowledge re