Automatic testing method, device and system and product to be tested

The invention discloses an automatic testing method. The automatic testing method comprises the following steps: receiving user datagram protocol (UDP) data packets broadcast by at least one product to be tested in a local area network, wherein the UDP data packets comprise Internet protocol (IP) addresses of corresponding products to be tested; performing transmission control protocol (TCP) connections with the corresponding products to be tested according to the IP addresses in the UDP data packets; and sending testing instructions to the products to be tested in a TCP way in order that the products to be tested are tested according to the testing instructions. The invention also discloses an automatic testing device, a product to be tested and an automatic testing system. Through adoption of the embodiment of the invention, the data transmission rate and the testing efficiency of the automatic testing system can be increased.