The invention aims to provide a position tracking method, a method for realizing augmented reality and a related apparatus and device. Certain virtual graphs, images, information and the like can be superposed in a real scene based on an augmented reality technology, so that the effect of enhancing the real scene is achieved; and an entity globe serves as a target entity, so that the entity globe can have the advantages of an entity globe and a virtual globe in the prior art at the same time. The position tracking is realized by obtaining a central coordinate point and a direction vector of the target entity in real time, and an output video frame is rendered in real time based on the central coordinate point and the direction vector, so that the virtual globe can rotate at the same angle and speed in the process of controlling the entity globe by a user, and the user experience can be greatly improved.