The establishment of operational support system and the implementation of operational requirements are essential factors that aircraft manufacturer/main manufacturers must consider to ensure that the aircraft can operate. Aircraft manufacturers in China have basically established the operation support system according to the requirements of Civil Aviation Administration of China (CAAC). However, for the airborne system and equipment suppliers, CAAC has not directly supervised each supplier, the supplier of airborne systems and equipment is an important part of product development and operation. The capability and responsibility of the foreign supplier of airborne systems and equipment are often consistent with that of the main manufacturer, both the collaborative engineering during the development period and the service guarantee during the operation period can ensure that the required technical level can be achieved, so it is necessary for the domestic airborne system and equipment suppliers to consider how to establish the operation support system that meet the operation support requirements of CAAC and the main manufacturer for the suppliers. According to the requirements of aircraft manufacturer operation support system issued by CAAC, from the view of airworthiness regulations and procedures, this paper systematically analyzes five aspects of the construction contents of the operation support system of the airborne system and equipment supplier, and puts forward ideas for constructing the operation support system of airborne system and equipment supplier, and points out the key problems that should be paid attention to in the system construction. It provides the idea and reference for the civil aircraft airborne system and equipment supplier to explore and build an operation support system.