A control method for an immersive system includes following steps. Raw pose data of a controller is tracked. The controller is configured to operate in one of controller modes. A current controller mode is determined among the controller modes. A target pose transform matrix is selected from a plurality of pose transform matrices according to the current controller mode. Each of the pose transform matrices is provided corresponding to one of the controller modes respectively. The target pose transform matrix is applied onto the raw pose data to generate adjusted pose data. A virtual object under the current controller mode in an immersive content is rendered according to the adjusted pose data.