In order to solve the problem that teachers and students cannot communicate effectively in virtual experiment, this study uses VRML-JS-Java communication mechanism to realize a virtual physics laboratory. Firstly, the paper introduces the overall design and scene hierarchy of the laboratory. Secondly, it expounds the modeling process and process of three-dimensional scene, and focuses on the realization of the interaction and perception among server, client, and user of interactive function, as well as key technologies such as VRML virtual scene and Java interface. Finally, the experiments show that the virtual physics laboratory has good reusability and interoperability in university experimental teaching.