The invention discloses a multi-business information interaction method of an electricity information acquisition system, and relates to the electricity information acquisition system. The interface service of the current electricity information acquisition system interacted with an external system has the defects of being bad in interface reusability, bad in maintainability and incapable of satisfying the user demand. The interaction method comprises the following steps: analyzing the externally interacted data of the electricity information acquisition system from three dimensions of the business feature, the data feature and the aging feature, extracting public elements to build an information interaction model; constructing a multi-business interface information interaction model, and dividing the multi-business interface information interaction mode into a request object model and a return object model; realizing efficient sharing of the electricity information acquisition data according to the constructed multi-business interface information interaction model when the electricity information acquisition system is interacted with the external system. By using the technical scheme disclosed by the invention, the database performance pressure of the electricity information acquisition system is shared, and the efficient sharing of the electricity information acquisition data is realized.