Nowadays, the notion that 'quantum mechanics and classical mechanics are incompatible' is firmly held in people's minds. One of the paths of the physics revolution was to break this notion and achieve the goal of combining classical mechanics with quantum mechanics. The Schrödinger equation for gravitational potential energy was derived by replacing the potential energy function. This equation can describe classical mechanical systems, and is a mathematical foundation that can be combined with classical mechanics and quantum mechanics. Mathematically speaking, the application of Hamiltonian operator and Schrödinger equation is not limited by whether the system is microscopic or macroscopic. The method of using the Schrödinger equation to solve problems is called the wave dynamics method (quantum mechanics method). The classical mechanical system can use the Schrödinger equation. This indicates that classical mechanics and quantum mechanics can be combined for the same system. As long as there is no superstition about the absolute dominance of existing quantum mechanical explanations such as uncertainty, superposition, and coherence in the microscopic world (Plus establishing a ring electronic structure model), the combination of classical mechanics and quantum mechanics can be used in practice. Multiple successful examples of using quantum mechanics without combining classical forces have been provided with the help of references.