Lifting device, track system and angle adjusting method of track assembly

The invention relates to a lifting device, a track system and an angle adjusting method of a track assembly. The lifting device comprises a control assembly, a supporting assembly and a movement assembly. The supporting assembly comprises a supporting end. The moving assembly and the supporting assembly are sequentially arranged in the first direction, the moving assembly comprises a base and a connecting component, the connecting component comprises a first end and a second end which are opposite to each other, the first end is rotationally connected with the base, the second end is located on the side, away from the base, of the first end, and a distance is formed between the second end and the supporting end in the first direction; the control assembly is configured to control the base to move in the first direction and drive the connecting component to rotate relative to the base so that the included angle between the connecting line between the second end and the supporting end and the first direction ca