An entity-relationship approach to the business, a structured, systematic and intuitive business model of entities, relationships and key data for innovation, entrepreneurship and management. The Business Entity-Relationship Model (ERM) presented in this work enables: - acquire a logical and interrelated view of the key elements of the business and its application in the processes of innovation, entrepreneurship and business management - provide a new definition of the business concept, represent all businesses generically, their specific types and any particular business - redefine innovation more broadly, generate ideas and increase innovation capacity - tackle entrepreneurship with an integrated and interdependent vision of the key elements of the new business - plan, execute and control the business strategy against competitors in a sector of economic activity - identify the origin and understand the apparently complex, heterogeneous and abstract concepts used in business management and generate new key or strategic data in an organized and homogeneous form The new model is based on the Entity-Relationship technique, which allows the representation of the real world by elements called entities and relationships that occur between them. In addition, new concepts called supra-entities, supra-relationships and supra-attributes to cover the diversity of situations and perspectives existing in reality are proposed.