Abstract: Compressed air system is one of the most important systems in traditional industries. As a main energy consumer, it has important practical significance to save energy from three major links of production, transportation and application. This paper analyzed the main energy consumption of compressed air from production and transportation to the utilization, and a series of improvement measures on energy saving were put forward and analyzed based on the actual working process of compressed air system. The analysis shows that the deep energy conservation transformation is a complex work which needs to be matched with each link, the energy consumption will be greatly reduced when traditional energy saving measures assisted by new frequency conversion technology, aircompressor station intelligent monitoring system and heat recovery technology. This paper can provide reference for energy saving reconstruction of air compressor system in factories and enterprises.