The Probabilistic graph is a research hotspot in machine learning at present. Generative models based on probabilistic graphs model have been widely used in image generation and speech processing. The restricted Boltzmann machines (RBMs) is a probabilistic undirected graph, which has important research value in modeling data distribution. On the one hand, the RBMs model can be used to construct deep neural network, and on the other hand, it can provide statistical support of deep nets. This paper mainly summarizes the related research of RBMs based probability graph model and their applications in image recognition. Firstly, this paper introduces the basic concepts and training algorithms of RBMs. Secondly, this paper summarizes the applications of RBMs in deep learning; and then, this paper discusses existing problems in research of neural nets and RBMs. Finally, this paper gives a summary and prospect of the research on the RBMs.