An important part of a field survey is to clarify the influence of long-term changes in solar radiation on stone cultural relics when the deterioration mechanism of the stone is discussed. So far, most of the relevant surveys and studies could only be carried out by establishing environmental monitoring stations. Hemispherical photography is a quick way to measure the sky view factor and is widely used in disciplines such as ecology. Through two case studies of field surveys on conserving stone cultural relics in Japan and China, the hemispherical photography method has proved to be effective in selecting the locations for environmental monitoring devices, determining the effects of solar altitude variation on the stone cultural relics, and comparing long-term changes in the exposure of stone cultural relics to solar radiation at different locations. The method is convenient, economical, and efficient. As an auxiliary means, it can be used more for the preliminary measurement and data analysis of the selection of environmental monitoring devices and determining the effects of solar radiation during field surveys on stone cultural relics.