A recognition method includes: receiving a training voice or a training image; and extracting a plurality of voice features in the training voice, or extracting a plurality of image features in the training image; wherein when extracting the voice features, a specific number of voice parameters are generated according to the voice features, and the voice parameters are input into a deep neural network (DNN) to generate a recognition model. When extracting the image features, the specific number of image parameters are generated according to the image features, and the image parameters are input into the deep neural network to generate the recognition model.