The invention discloses a display device assembly for punching, registering and content rightness of indoor-and-outdoor competition activities.The display device assembly is composed of basically-consistent-shape functional modules such as a power module, a display module, multiple function control modules and multiple function connecting modules, the functional modules can be superposed and combined at will, and the functional modules can be fixedly connected and can be combined in a rapid-installation connecting mode; a plurality of rapid-installation connecting inserting pieces can be arranged on the upper faces and the bottom faces of the functional modules, other functional modules can be rapidly connected and fixed, control signals can be transmitted, a power source can be connected, and charging can be carried out; a special charging case comprises sliding wheels and a handle, and can store and transport a plurality of body structures of the display device assembly and can also charge the body structures; charging can also be completed through a charging base or a charging plug; the display device assembly can be installed on a matched support in use.The display device assembly can be triggered in multiple ways for displaying, real-time activity information can be obviously displayed, the functions of the device are increased, the use convenience, the ornamental performance and the entertainment performance of the device are improved, and the display device assembly can be applied to multiple competitions and activities.