This paper is proposed that ontology_based Oriental Medicine Customer Relationship Management system is designed with existing OCS, EMR, ERP system for oriental medicine center of efficient customer information management and analysis. As using ontology technique, we support oriental medicine service at grade according to quality and healthy of the customer. Also we designed 4 kind oriental medicine customer relationship management system frame - customer management, public relations/marketing, service management, statistics/analysis - in the customer management process standardization through a medical expert system.