At present, the measurement accuracy error of the gravitational constant is relatively large. When I was thinking about the energy of the electrostatic field a few days ago, I had an assumption that the energy distribution of the electrostatic field is a basic factor of space-time composition. Therefore, the change in the energy distribution of the electrostatic field directly means that the structure of spacetime has changed. The change of space-time structure directly affects the gravitational constant. We can notice that the distribution of the electrostatic field energy in the entire solar system is directly related to the orbits of the planets. Among them, Jupiter has the greatest influence on the energy distribution of the electrostatic field on the earth's position. The mass of Jupiter is approximately one thousandth of the mass of the sun. If only the gravitational influence is considered, experiments on the earth to measure the gravitational constant can offset Jupiter's gravitational influence through technical means. But if the energy distribution of Jupiter's electrostatic field changes, it will cause changes in the space-time structure around the earth. This change in the space-time structure directly leads to a change in the gravitational constant, which results in different values of the gravitational constant measured by experiments completed at different times. The purpose of this article is to remind experimental physicists who measure the gravitational constant that their experimental results may be related to the orbital position of Jupiter.