Abstract: Gravity is caused by mass and is not susceptible to interference. In the vicinity of the Earth, the greatest influence on the gravitational force of an object is the Earth, followed by the celestial bodies in the vicinity of the Earth. The magnitude and direction of the gravitational force varies with time from and it is regular, while the magnitude and direction of the gravitational force on an object’s location can be measured. Therefore, there is the possibility of positioning inversion by gravity. This paper discusses the universal positioning method by measuring gravity, through forward and inverse simulation, consider it is feasible to positioning through gravity. Then verify the relationship between the positioning error and the observation error.