The invention relates to the air-conditioner production field, in particular to the frequency conversion air conditioning outdoor device testing system in the production process. The frequency conversion air conditioning outdoor device testing system of the invention integrates a variety of outdoor device communication protocols, and a variety of machine models, a variety of testing models, a variety of detection methods testing procedures, and by the machine model setting, it can achieve the detection to a variety of air-conditioning outdoor machines, making the testing system more common; according to the detection mode setting, it can use multiple detection models to detect the tested outdoor machine, making the testing system detection functions better; according to the detection method setting, it can use a variety of detection means to detect, making the testing system more flexible during detection; the frequency conversion air conditioning outdoor device testing system of the invention can also real-time display the return signal of the measured outdoor machine, making detection results more intuitive, and more understanding.