A multi-angle attachable display device includes a polygonal light emitting module and a control module. The light emitting module has a light emitting layer with at least one light emitting unit, a module driver, and multiple connection ports. The at least one light emitting unit includes a unit driver that electrically connects the module driver. Each of the connection ports is mounted on a side surface of the light emitting layer and electrically connected to the module driver. The control module includes a controller connection port, a wireless communication unit, and a processing unit. When the controller connection port is connected to one of the connection ports of the light emitting layer, the processing unit detects a connection pathway of the light emitting module, and the processing unit generates and sends a light pattern signal to control the unit driver through the controller connection port and the module driver.