Fundamentals of thermal engineering is a subject that studies the law and application of the conversion of heat energy and other forms of energy. This course is highly theoretical, abstruse and difficult to learn. In order to improve students’ learning efficiency, based on finite element method and COMSOL simulation APP, thermal engineering basic virtual simulation experiment platform is developed, and the packaging of APP is realized. Students can numerically simulate heat transfer problems of three types of boundary conditions in thermal engineering foundation through the APP interface, and realize visual display of simulation results. The work reported in this paper is a beneficial attempt to enhance students’ interest in learning, reduce their learning difficulty, and deepen students’ understanding of basic concepts of basic thermal engineering.