Testing device and testing system for testing Dongle device

The invention discloses a testing device and a testing system for testing a Dongle device. The testing device is used for testing the Dongle device of a data interface converter, and comprises a first interface mechanism, a testing mechanism and a display mechanism. The first interface mechanism is connected with the Dongle device, the testing mechanism is connected with the first interface mechanism and used for outputting testing signals to the Dongle device through the first interface mechanism, searching for and receiving the feedback signals output by the Dongle device based on the testing signals and obtaining the operation state information of the Dongle device according to the feedback signals, and the display mechanism is connected with the testing mechanism and used for displaying the operation state information. Through the testing device and the testing system for testing the Dongle device, the performance of the Dongle device can be accurately tested.