Human Reliability Analysis (HRA) is an important element in probabilistic safety assessment (PSA) for nuclear power plants (NPPs). The data of human errors and the relevant performance influence factors provide essential bases for quantitative analysis of HRA. In this paper, a simplified introduction of the evolution of HRA work in Shanghai Nuclear Engineering Research and Design Institute (SNERDI) is first presented. Then the process of HRA data collection is introduced. Next, the data collection steps and analysis results are respectively given as examples with two typical NPPs, i.e., a 300 MWe NPP with data collected from simulator exercises and operator interviews to support the HRA quantification with a specified HRA method, and a passive NPP with HRA data collection for the study of human error mechanism. Collecting and accumulating operator performance data for HRA, operator error prevention program, and human factor review program are paid close attention during these years. More work of data collection will be carried out both for the new plants and operating plants to support the HRA database development and HRA work.