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By using the data of conventional meteorological observation, GPS precipitable water, lightning location, and NCEP 1° ×1 ° reanalysis grid point data on 4 and 5 July 2013, a heavy rain event occurred in the central and southern Shandong is analyzed from the characteristics of different stages and formation mechanisms. The results show that the vapor sources of the torrential rain came from the South China Sea; the strength of the lowlevel jet was positively related with that of the water vapor flux; the rainfall intensity, influence scope, and duration of warm shear line storms are bigger than these of cold shear line storms; the GPS precipitable water of cold and warm shear line storms is different. The positive and negative ground lightning activities of precipitation clouds show the antiphase relationship, and the change of the positive and negative ground lightning can well reflect the change of the heavy rain. The dynamical structures of cold and warm shear line storms are different: the physical quantity field of the former tilted to the north from low to high levels, and that of the latter distributed vertically. The upward movement area of cold shear line storm was deeper than that of warmer type shear line storms.