Abstract: Safety and design quality play a key role in enhancing the operation efficiency of “Human-Robot System” of hospital public environment disinfection robots. Based on ergonomics, interaction science, and cognitive science, explorations were conducted on the safety design and interaction strategies of the hospital disinfection robot. The hierarchical task method was employed and combined with the table task method (HTA-T) to construct the task flow of disinfection operation. The typical safety accidents in the operation process and causative logic were analyzed, thereby establishing an abstract model of disinfection tasks based on the work domain analysis (WDA) method. The SRK decision analysis method was utilized to judge the cognitive behavior pattern mode (skill-based, rule-based, or knowledge-based) of hospital disinfection robot operation, and to match the relationship of cognitive factors. The theoretical model framework of operation safety design evaluation for the disinfection robot was constructed, and the design strategies based on four safety indicators were proposed: functional requirements, morphological structure, appearance color, and human-robot interaction. The outcome can shed light on the basic theoretical research and design practice of human-robot ergonomics of hospital public environment disinfection robots. 

Key words: hospital disinfection robot, operation safety, human-robot interaction, design strategies, evaluation model