The invention relates to a method for calculating a light intensity lower limit of an active luminescence mark point in a VR (Virtual Reality) photography site. The method comprises the following steps: acquiring a greatest distance between the active luminescence mark point and a VR camera in a VR photography site; and calculating the light intensity lower limit of the active luminescence mark point in the VR photography site based on the greatest distance and a minimum light intensity value which can be received by the VR camera. Through adoption of the method, the light intensity lower limit of the active luminescence mark point in any VR photography site can be calculated. The illumination strength of the active luminescence mark point is set according to the light intensity lower limit, so that point losing in a VR photography process can be avoided, and meanwhile electric energy can be saved.