NOVELTY - The device (100) has a flange (5) attached with a connecting plate of a connecting part (3) and located with respect to an adjustment axis (Y). The flange rotatably supports a linear type motor-driven actuator (4), and is connected to a fixing plate (2) to move the fixing plate about a tracking axis (X). The connecting plate and the flange comprise two holes. A locking part i.e. bolt, is formed with the holes to realize relative rotation between the flange and the connecting part about the adjustment axis, and locks the flange and the connecting part in a determined relative position.    USE - Supporting device for supporting photovoltaic panels in a single-axis tracking photovoltaic system.    ADVANTAGE - The connecting part is set between an upright part and the fixing plate so as to make the panels to be spaced from an installation surface during operation of the single-axis tracking photovoltaic system. The device realizes simple and accurate installation of large photovoltaic system without requiring cement foundations, thus avoiding the need for complex stages of adjustment and regulation to realize normal function of the system. The device is simple in structure and easy to install without need to utilize multiple welded components, and requires less quantity of steel material and reduces labor intensity. The device comprises a GPS device, which performs geographical locating function so as to automatically define parameters that regulate tracking movement, thus ensuring accuracy of installation of the system and allowing the installed system to be immediately operative without requiring long stages of preparation. The device enables correcting alignment or positioning errors occurred during installation of the upright part, so that the upright part can be simply installed by driving process. The device can be formed by a series of components that are simply and directly assembled at a place of installation of the system, so that production and storage costs of the system are reduced.    DESCRIPTION OF DRAWING(S) - The drawing shows a side view of a supporting device.    Tracking axis (X)    Adjustment axis (Y)    Fixing plate (2)    Connecting part (3)    Linear type motor-driven actuator (4)    Flange (5)    Supporting device (100)