The precipitation observation data after quality control is taken as the “true value”, and multiple indicators are used to evaluate the applicability of the real-time three-source merged analysis product of 5-km hourly precipitation (referred to as “FRT_05”) and the real-time multi-source merged analysis product of 1-km hourly precipitation (referred to as “RT_01”) developed by National Meteorological Information Center in Shandong during the flood period of 2021 and Typhoon In-Fa process. The results are listed as follows. (1) The applicability of both precipitation products in Shandong is good, but the refined real-time monitoring capability of RT_01 is better than that of FRT_05. (2) The inspection indicators have obvious monthly variations, and the applicability of precipitation products is the best in September,when the precipitation takes the second place. (3) The applicability of the two precipitation products is relatively poor in the west of the mountainous areas in middle Shandong province and coastal areas of eastern Weihai and Qingdao with complex topographies, as well as in most of the islands. (4) From the inspection and evaluation of different precipitation levels, it is indicated that the mean absolute error (MAE) and root mean square error (RMSE) increase with the increase of precipitation; the relative deviation (RD) of moderate rainfall is the smallest, and the two products overestimate the actual precipitation intensity of moderate rainfall and below, while they underestimate the actual precipitation intensity of heavy rainfall and above. (5) For Typhoon In-Fa, the monitoring and reproduction capabilities of RT_01 are obviously better than those of FRT_05 with respect to the precipitation intensity and the precipitation area, while both products underestimate the actual precipitation intensity on the whole.