Testing system of VCU

The utility model relates to a testing system of an electronic instrument, in particularly to a testing system of a VCU (vehicle control unit). The utility model provides the testing system with a simple hardware structure, in which the hardware structure is no need to be changed even through the model numbers of the tested control units are variable; moreover, the technical problems in the present VCU such as complicated hardware structure, high cost and requirement on altering the hardware structure when the model number of the tested VCU varies are solved. The testing system comprises an industrial control computer with a USB bus interface and a VCU to be tested, a digital I/O (input/output) card, an analog I/O (input/output) card, and a USB-CAN (universal serial bus-controller area network) card, wherein the industrial control computer performs signal transmission with the VCU to be tested via the digital I/O card, the analog I/O card and the USB-CAN card; and the industrial control computer comprises a memory, and a testing system software is mounted on the memory.