Abstract: Sometimes, the operators can not judge next possible monitoring object which would lead to monitoring delay or transfer error in the monitoring digital human-computer interface parameter information process in nuclear power plant. Aiming at the situation, the forecasting path plan method including forecasting path model, forecasting path plan algorithm and the calculation method of transfer path success probability and which is based on Markov process was proposed. Then the monitoring transfer behavior of the operators when SGTR（Stream Generator Tube Rupture） occurred abruption accidents is analyzed based on the method proposed in this paper, taking the digital human-computer as the source node of monitoring task of t time, the transfer path of next monitoring object was obtained successfully to improve the efficiency of monitoring and to minimize the risk of monitoring error, which will also contribute to analyze the driving mechanism of operators’ monitoring activities, to train simulated for monitoring behavior, and to optimize the digital man-machine interface.