Using the method of geological analysis and taking the Shuigonghe syncline, Zhijin—Nayong Coalfield, as a case, the nonlinear occurrence of the geological conditions of the coalbed methane (CBM) in vertical section was discussed based on the measured data, and the academic viewpoint “unattached multiple superposed CBMbearing system” was suggested and demonstrated preliminarily. It was shown that the mean CBM content of single Upper Permian coal seam and the content gradient between backfence seams are various in undulation, there is two sets of the distinct system in the correlation of the coal seam depth to the reservoir pressure coefficient, and the secondary sequences in the stratigraphic frame is highly consistent with single sectioning of the CBM gradient. These imply that the exchange of the undersurface liquid in the coalbearing strata is generally absent among various coal seams, which might results in relative independency of the CBM systems among various coal seam groups. It was considered that the characteristics of the coalbearing strata sequence might supply a physical property base for the unattached multiple superposed CBMbearing system and the la ck of the hydraulic connection of the coalbearing strata to the superposed and underlied aquifers might supply a hydrogeological base for the formation of the systems, that is to say, the unattached multiple superposed CBMbearing system is jointly controlled by sedimentary, hydrogeological and structural conditions. It was also emphasized that the system might occur widely in the multicoalseam strata formed in delta—tideflat—lagoon environments.