Abstract: Taking the operation steps of weighing water volume in the virtual simulation experiment for measuring the thermal performance of gas stoves as an example, this paper analyzes the physical parameters and logical relationships required for action design and automatic scoring under interactive and open operation conditions. It discusses the design experience of virtual simulation experiments with open operation characteristics, particularly the uncertain experimental phenomena and related expression effects caused by numerous non-established operations, and refines the experimental operation steps and corresponding scoring logic. After continuous optimization, the experiment approximates the laboratory experiment in terms of experimental purpose presentation, operation complexity, operation duration, operation scoring, and experimental test errors, achieving maximum restoration of the physical experimental bench's operation mode and teaching effectiveness. This provides a reference for experimental instructors in the construction of virtual simulation experiment projects.