A wireless transmission device, arranged inside a display object or connected with the display object, includes a power supply interface, an initialization setting button, a wireless transmission unit, a processing unit, and a storage unit. The input end of the power supply interface is connected with the power supply end of the display object, the output end of the power supply interface is connected with the wireless transmission unit and the processing unit respectively, and the initialization setting button and the storage unit are connected with the processing unit respectively. A unique identification assigned to the display object is stored in the storage unit. Initialization setting of the wireless transmission device is implemented by pressing the initialization setting button, and the processing unit transmits out the identification, orientation, and/or predetermined viewable angle of the display object constantly or regularly via the wireless transmission unit.