According to the aircraft inert system technical target, a bleed air simulation system is designed and implemented. The pressure control system was implemented by electro-hydraulic servo system. The temperature control system was implemented by temperature controller, Thyristor tuner and K-Thermocouple. The system data acquisition and process control was implemented by LabVIEW software and signal conditioning. The air source export pressure regulation was implemented by means of relay switch to control the compressor starting and turning off. The bleed air pressure and temperature were implemented by proportion integral derivative (PID) control algorithm. The test result shows that bleed air simulation system can meet inert system inlet required pressure and temperature, and the system control precision meets the demanded technical target.