Abstract: An adjustable supporting frame includes a fixing element, a first adjusting member, and at least one second adjusting member. The first adjusting member includes a first rotating portion and a second rotating base. The first rotating portion rotatably coupled to the first rotating base. The second adjusting member includes a second rotating portion and a third rotating base. The second rotating portion is rotatably coupled to the second rotating base. The third rotating base is configured to couple to a product. An adjustable lighting device having the adjustable supporting frame is also provided. The adjustable lighting device can achieve a large adjustment range and a large illumination range.