A support module for supporting a display module and a display device using a support module and the display module is disclosed in the present invention. The display device includes display module housing, a display module, and a support module. The support module includes a linking unit and a supporting unit. The linking unit and the supporting unit are partially linked and their corresponding positions are changeable. The linking unit extends out a first length or a second length from the receiving portion. The display device further includes a base. When the linking unit extends out the first length from the receiving portion, the display module housing separates from the base. When the linking unit extends out the second length from the receiving portion, the display module housing can be connected to the base by the linking unit.