The traditional indoor test of the infrared search and track system usually uses a test device with several collimators,which are fixed at different azimuth and pitching angles.The test device is not suitable for short distance indoor experiments because of its low accuracy,huge size and uneasiness to move.The proposed small target track simulation system drives the small target disk by a precise stepping motor.The blackbody radiation sources provide target temperature.PC connects the stepping motor through RS-232 serial interface,the software interface written with Visual Basic sets the stepping motor′s running speed,direction and the operating angle value.PC shows the object′s coordinates track and then turns them into azimuth and pitching angles through the measuring angle algorithm.Comparing the azimuth and pitching angles measured by the infrared search and track system with the theoretical value then the tested system′s precision is gained.The design and implementation of the small target track simulation system are discussed in detail.Analysis for the experiment results is also presented.