A navigation method for a medical operation and implemented by a robotic system is provided. The method includes the steps of: receiving, at a processor of the robotic system, at least one set of navigation data； receiving or generating at least one three-dimensional model of the virtual object in the navigation data； calculating the navigation data to generate a virtual environment and at least one navigation instruction； and presenting, at a user interface associated with the robotic system, the virtual environment and/or the navigation instruction to a user of the robotic system for the user to refer to during the medical operation.
