The present disclosure provides an organic light emitting diode (OLED) display device and control method thereof. The OLED display device includes: a plurality of subpixels that are arranged in an array having a plurality of rows and a plurality of columns, wherein at least one of the subpixels comprises a control transistor, a light emitting element, and a drive transistor for driving the light emitting element; a plurality of detection lines, wherein at least one of the detection lines is electrically connected with the control transistors of subpixels in a same column, for detecting an electrical property of the drive transistors of subpixels in the same column through respective control transistors; and a plurality of group detection control lines, wherein at least one of the group detection control lines is electrically connected with control transistors of a subpixel group, the subpixel group comprising subpixels in a first row and subpixels in a second row.