The studied methods of lunar-surface temperature are concluded. They are divided into direct method and indirect method. Their features are analyzed. It is expensive for the launch and maintenance of detector in direct measurement and remote sensing based on spacecraft; the studies based on explored data and analyzed data of lunar samples are limited in time and space; and earth-based remote sensing has a low spatial resolution. Because of these limitations, the above methods couldnot be used in the study of global variation of lunar-surface temperature. To attain such a purpose, the accurate lunar-surface temperature physical model must be made. By analyzing the physical models which have been made, we conclude the factors which influence the lunar-surface temperature, such as lunar-surface solar radiation, lunar interior heat flow, the thermal absorptivity, thermal emissivity, heat capacity, and density of lunar materials. The progress of studies in these factors is depicted. And some proposals are made at last.