The invention provides an object detection method, electronic equipment, a system and a medium. The method comprises the steps of receiving a to-be-detected picture; inputting the to-be-detected picture into a pre-trained detection model, the detection model being trained in a cooperative training mode; obtaining an output result of the detection model; and determining the probability that the to-be-detected picture comprises a target object and the position of the target object according to the output result. According to the method, the problem of insufficient generalization ability during object detection and the overfitting problem caused by difficult acquisition of samples are solved, the performance of the detection model during object detection is improved due to cooperative training, and the accuracy of object detection is further improved.