This paper firstly analyzes the key behaviors of operators in the interface management tasks by using Systematic Human Error Reduction and Prediction Approach (SHERPA), and then uses INTERACT9, a kind of software, to analyze the video of the operator operation in the interface management tasks on the full range simulator of one nuclear power plant in China. After the statistical analysis of the data collected by INTERACT9, the four general characteristics of the tasks are obtained: a. The most frequent operations are conducted on the menu bar, ...