According to the standards of meteorological disaster evaluating grades, as well as personnel casualties and property loss, thunder and lightning disasters are divided into 7 grades, and the corresponding standards are determined. Based on the characteristics of thunder and lightning occurrence in China, considering disasterinducing factors, disasterbreeding environments, and disasterbearing objects, the density of ground lightning （or the density of lightning strike）, the occurrence frequency of thunder and lightning disasters, the population density, and GDP per capita are chosen as indexes to evaluate the occurrence potential of thunder and lightning disasters, and examples are given.