Shale gas is a new type of efficient and clean energy. It has the feature of“self-generation and self-accumulation”，and it is hosted in organic-rich shale in various forms such as free gas，absorbed gas and solution gas. According to geochemical，well logging，mud logging and other data，the shale gas forming conditions in Shandong Province are systematically analyzed. It is believed that the marine-continental transitional shale with typeⅡ-Ⅲkerogen in Upper Paleozoic Shanxi-Taiyuan Formation，the lacustrine shale with typeⅡ-Ⅲ kerogen in the 2nd member of Kongdian Formation in Cenozoic，and the lacustrine shale with typeⅠ-Ⅱkerogen type in the 3rd member and the 4th member of Shahejie Formation in Cenozoic are favorable exploration strata of shale gas resources in Shandong Province. Based on the on-site desorption gas data extracted from the parameter wells，shale gas content calculation models suitable for Shandong Province are proposed，the total organic carbon is used to estimate the gas content of lacustrine facies and marine-continental transitional facies shale with typeⅡ-Ⅲ kerogen，and the gas/oil ratio is used to estimate the gas content of lacustrine shale with typeⅠ-Ⅱ kerogen. According to the identified key parameters of shale gas resource evaluation，the resources of favorable shale gas area in Shandong Province is estimated to be 1.42×1012 m3.