The invention provides a living body detection method and device and a model evaluation method and device, the living body detection method comprises the following steps: training a preset living bodynetwork according to a training sample set to obtain a living body base model, wherein the training sample set comprises a living body sample set and an attack sample set; training a preset adversarial network according to one or more attack samples in the attack sample set and the living body base model to obtain an adversarial model; inputting one or more attack samples in the attack sample setinto the adversarial model to obtain an adversarial sample set; training the living body base model according to one or more living body samples in the living body sample set, one or more attack samples in the attack sample set and one or more confrontation samples in the adversarial sample set to obtain an adversarial living body base model; and determining whether the object in the to-be-detected sample of the to-be-detected sample set is a living body or not according to the adversarial living body base model.