The paleoclimatic studies of reconstructions on the Little Ice Age climate with proxy data and records of meteorology in history are reviewed. The global and East Asian monsoon regions′ climatic features and the possible factors of inducing low temperatures during the Little Ice Age are conclued. It is also introduced that the present numerical simulating results on mechanisms of the Little Ice Age, and it is suggested that the main effective factors and some feedback processes should be put into models for simulating in the future.